Sinclair User Magazine Issue 018

An independent magazine published by ECC Publications
September 1 983

Issue No 18

QUEST FOR GOLI

How to write
your own ■
chess progra

I* *

Outstanding Features

Self centreing. Slick

Super strong nylon and steel construction

A total of E directions plus 2 large fire buttons (tor left or

right handed operation)

Arcade proven moukled leaf switches ensure incrcdjbie

reliability

Complete with boxed interface on Spectrum models

A wide range of Joystick compatible software readily

available from W H Smith and leading computer shops or

direct from us

NEW

Conversion Tape I Oily £*9S - Qmrtu seven lejdn^ incHfe J»TW5 cci'mwi'i li'e KertlpiCOn
lapudl hk>*lie OwSkimfi - Suit I air. Hungry H or* e - Sinclair, flight 5*nulaIX>rt - intlair,
Arties - Imagine. PenelriK* MeHwr* Home. Sped.™ Big Brre. 5pKP 7nn*4=

ALSO

Connriiofl Tap* II Only U « (.on li Chbutr ■ 5il*ena»i, Licape New Sen, Tjtij

DK TroniTS, Cenqpctte - DK T. snka. SfKKrral lr™ters - Bui Bjrt*. Cn*tirig On Iradvrav

Sumhine, freni^ - OuKlts.mn iTarty VenkmaJ

Jmptich C**»^*tiW« Spectrum SotS*!'* fH"iw JrtiublF Trom Kempioft

*AsTro Starter ■ Bln»1 ABfy ■ Cramir Ciienlla ■ CtrirtWi ■ Cy«KT Rati » ETX" Fr-Kiliy

■ Fmggrr ■ Gatem ■ Gtlpman ■ Je[ P*: ■ fain: ■ Knot in 3U ■ H*m;i.*« ■ Mrreorodi

■ Hini.' Urt ■ P555T • JO Tunnel ■ Time Gate ■ Slippery id • Spookrnan

11 5hcepwaft ■ SD P»ncef ■ Boiy &!» ■ Violent dni«iM ■ Cookie ■ Tram Am

Che^ucj'poital enter* should be madfc payst*- to Kwnpnon (Merol Elecironici Led
PkktC debu my AjccesvVisa' A-ccoum | ■ocfeie ii applKjbie)

Hardwar* I wi<h TO -jfdrr the 1ylbwn£

har* ^ectnjni (uyiLm &Kjer**ie. aUcrvra jfnu uj uie jut
^UfvCffTrrirjrtore Type \<rfAkM with Spectrum
SptXinm JoyKKk intl<j*rr£ rrtfftace
VIC ID. C Crtmsdors fe4. Alan 40ft'800 |tv^rit>

flfMT DdE appruy ute W"

i,|l pn Lrs ndtHh PSP and *Al Q wWM M prscci jdd H 00 P*P

Atcognt No
5jgMSUM

Addrr/H

Njiiit

FVai*: post to Kempsion (Micro) Ehstra™ci, DeptSuS
LJnir 10 Singer Wiy, Wobuni Road lirduHrul Estate,
KtmnsLor-. Bedford

SOLE UK DISTRIBUTOR

HEmp>Ton

*^ m MICRO "ELECTRONICS

Contents =

incorporating Spectrum User

Editor

Nigel Clark

Ciinsuluinl editor

Mifcc Johnston
Production editor
Harold Mayes MBE

Staff writer
John Gilbert

Program reviewer

Rebecca Ferguson

111 us trator'De sign er

Brian King

Editorial director

John Stcrlicchi

\tl\ ertlsctnenl manager

John Ross

Sales executive

Annette Burrows
Editorial assisiani
Margaret Hawkins.
Production a^sislani

Dsri Eparnincmdou

Managing director

'Terry Gait Wright

{Chairman

Richard Hcasc

Sinclair User is published monthly

by £CC Publications Ltd.

Telephone
All departments
01-359 3525

If yrtu would [ike- to contribute to
any of ihe Sinclair User group of
publications please send programs,
articles or ideas for hardware
project s to:

Sinclair User and Programs,
ECC Publications,
196-200 Balls Fond,
London Nl 4AQ

Programs should be on cassette and
articles should be typed, We cannot
undertake to return them unless a
stsirriped-addressed envelop is
included.

Wc pay £10 far ihe copyrighi of
each program published and £50
per 1,000 words for each article
used.

© Copyright 1985
Sinclair User
ISSN No 0262-^458
Printed and typeset by
Oadlev Print PLC,
w'arley,
Wen i Midlands

Distributed by

Spotlight Magazine Distribution Ltd,

1 Benwell Road,

Holloway,

London N7

01-607 6411

Cover Photograph:

Press Agency York

t

5 SINCLAI11VOYANCE We assess the implication* of the Microdrive and <nher develop-
ments in the market in the last month,

I I SINCLAIR USER CLUB Your club is continuing to grow with an increasing number of
j'ood oilers.

15 NEWS The Microdrive arrives; a special offer on the price of the ZX-&1; growth HI reiail
outlets; and much more.

19 LETTERS Our pOsthag has been bulging In receril mJHUAa j.nd we give an extra page to |

your views.

27 HARDWARE WORLD Another three pages on the latest add-ons to keep you up-to-date
on how you can expand your machine,

33 SOFTWARE SCENE Losing weight, landing on the Moon, and an original Pae-man-
type game are among ihe delights this month.

40 CAMBRIDGE AWARD Your last chance to win a fortune in our search for the
top [rmgrammer of 19K3.

49 3T1 GAMES M;niy programs, try in- add all extra dimension. John Gilbert sees hriw

Mjccesafn] they have been.

55 SECOND-HAND MARKET More people arc seeking to buy inespensivej used
machines, Stephen Adams gives advice on the care you should exercise.

63 PROGRAM PRINTOUT Card games and paying your mortgage arc two of the items in

our i tip listings.

84 USER OF THE MONTH Claudia Cooke meets a top athlete who uses his ZX-8I ro help

him cowards an Olympic gold medal.

91 PROGRAMMING Chris Wbitnngion gives some lips on the writing of chess program,

95 FORTH In the firsi of a new series, John Gilbert shows how Forth Lan help in
programming.

103 INSIDE SINCLAIR We speak to Bill Matthews, the finance director who has known
Sir Clive since schooldays.

III STARTINC FROM SCRATCH Our regular feature to help new users obtain the most
from their machines.

1 12 SINCLAIR SIMON Our hero is worried about his new Microdrive.

119 BOOKS Parents can now obtain advice on how 10 understand children's fascination with

computers. John Gilbert reports,

123 HELPLINE Andrew Hewson writes about the problems of safeguarding your programs.
129 MIND GAMES Queniin Heath, goes in search of the graphic adventures.

f j 135 SOFTWARE DIRECTORY This month we begin a new service (o ranters* a

complete list of commercial software for Sinclair machines. The first part is published this
month and ihe rest will follow. It will form a regular fearure in rhe months which follow.

NEXT MONTH

A special voucher which can be exchanged at
Rumbelows is one of the many offers in the
October issue of Sinclair User, plus the second
half of the Software Directory.

SINCLAIR USER September 1983

"IT LOOKS NICE BUT WHAT

THE HELL CAN I DO WITH IT?"

Every zx SPECTRUM Print n" Plotter Jotter has 100 pages of finely
printed screen grids.

50 for the hi g n resolution screen. SO for the normal character
screen.

with these at your disposal you can plan practically any graphics print
put to program into your computer.

The high resolution plot grid shows every one of the 45,060 pixels!
Every one printed . Every one with Its co-ord i nate no mPers . This gives
you enormous grapnics power to draw, plot, CIRCLE. PLOT OVER and so
on in arty position or screen pudding up graphic drawings, charts, maps
... in fact anything without tne complications of guesswork, integer
out of range, or wrongly positioned pixel colours wh Ich change PRi NTed
INK characters!

The normal character PRINT grids on tne other hand wi 1 1 al I ow vou to
be specific about PRINT ftT, TAG, PRINT OVER. SCREENS and INK PAPER in
d i rect co-ordination with plot . vou see every page is printed on high
quality tracing paper . . . Ideal to overlay on to Illustrations and copy
or co-ordinate.

And there S another bonus, because each page contains 2d User
definable grids — 2400 per pad!

With 50 pages of plot grids, 50 pages of print grids 2400 user-
definable grids, a set of colour pens, a printed pixel ruler and our
Special Offer of demo programs, IT 5 THE BEST value in zx graphics
PROGRAMMING.

NOW WHICH KEY DO II

■liTiT

liXQi'l'i'iV]

Everforgotten which key to press when playing a game?
Do you suffer from a mind-boggling mass Of programmed keys?
do you write programs that use different keys to perform various
functions? if so , we have just the th I ng for your ZK spectrum.

A PACK OF Print n Plotter Keyboard Overlays.

Just write the function or functions under each key you program and
keep the overlay for the next time vou play the game.
Of course there's lots of more uses vou win find for our overlays, user
defined characters, keyboard scanners , mathematical prog rams ,
business uses — to name ] ust a few.

There's ten o v erlavs to a pack — so you can program with I mpu n I ty I
And they fit pert ectiyonto your standard zx spectrum keyboard.
Each OVERLAY Is printed wl tn the cursor movement key directions and
there's room for program name etc.

" PRINTER PAPER THAT WORKS?
I DON'T BELIEVE IT!"

Five rolls of our printer paper will only cost vou E12.S0 Including
postage, packing and VAT! And you'll gain a great deal morel

it prints beautifully. Its not too thick, it's not too shiny. Print Is black
— not grey, it actually feeds through the mach ine!

see for yourself only £12.50 including everything Its a bargain!

A SPECTRUM CONSOLE
THAT EVERYONE CAN AFFORD!

For the cost of a games' cassette you can have a truly professional
console for your SPECTRUM!

we ve cut costs (not cut quai ity) by designing a self assembly method
using relatively inexpensive materials like strong corrugated board.

The result Is a console that's tough, light, highly finished and capable
of giving years of useful service.

Facilities include ergonomic keyboard angle, access to rear of
machine c ho I ce of p. s. u . I ntema I or external , and alternative of Printer
on- board or cassette storage area. Fully illustrated instructions are
Included _-

Post today to Print 'n 1 Plotter Products. 1 9 Borough
High street, London SE1 9SF or phone: 01-403 6644
(General i or 6607231 (credit Card Sales).

Hame:

Address

. . ZX SPECTRUM JOTTER © £9.95 each
. .. ZX SPECTRUM KEYBOARD OVERLAYS

@ E2.95 per pack

.... ZX SPECTRUM CONSOLE ffl £5.25 each
.... ZX PRINTER PAPER @ CI 2 50 per five rolls
.... ZX SPECTRUM DEMO CASSETTES @> 95p each
.... ZX81 JOTTER PADS ® E3.50 each
.... ZX91 FILMS 8 £2.25 each
... ZX81 GRAPHICS PROGRAMMING GUIDE
@ £1.50 each

RemKtmoe WKtOS*y&. Please bill my Access, '■Barcls-ycard/
vim / M jscerc jrd No:

Ail prices m< ilhJh vat. ft? Overseas orders please add 2S%
for add.1 cional surface mai I

WHRECANIGETTieJ!?"

*iiu Ljns^e and bvymoct DP our pf ™i.n _ 'f jir

H M. Sm WKtOntflutftr StDns!

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Dll rCHWrer-imirawmMHSB 6^5011
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Strwnmnt iCXeltHiium OilJ 2 ja ?g 1
M»tMWinOrieaiiK.TilnM2I 15}}?|
Mk-ro Horn* tompurers 1Dr*n«v «( J 1 u ■ 1

<ihiu1liinabwla-irliFW«ilUiriHiaUD>|i>LiiI

End of mail order in sight?

AT LAST, the long-awaited Microdrives have arrived
and that is* official. We, the privileged members of the
Press, have been introduced to one by Sir Clive. We
had to be introduced because the finished article was not exactly
what we expected from the earlier descriptions and the pictures
which were shown in advertisements until only recently.

As seemed almost inevitabfej it has aroused mixed reactions,
many no doubt having had their expectations raised by the
wait of more than a year since the 'revolutionary* storage
system was announced. It will take some months, however,
before a true assessment can be made of its worth and whether
a decision to buy the Spectrum on the basis of the Microdrive
was justified.

One difficulty which has already arisen is the possible non-
compatibility with the Micronet 800 adaptor. That will limit
the amount of information which can be downloaded from the
Micronet system at any time.

With the time it has taken to get the rwo major develop-
ments in the Sinclair market this year off the ground it should
have been possible to find compatible areas in which they
could be attached to the Spectrum. Both will result in a large
expansion of the uses of the Spectrum on their own but
together the possibilities would have been multiplied.

It is a good idea for a company to keep its latest develop-
ments secret &o that competitors do not have the opportunity
to close the gap on its technical advances. It is not a good idea
to keep associates so much in the dark that clashes of this kind
occur.

On the more positive side, the Microdrive ROM which
removes the bugs on the original Spectrum ROM and also
allowed users to write their own versions of Basic are to be
welcomed.

While the appearance of the Microdrive is a major evem in
the Sinclair year, it is likely that other developments in the last
month will have a more lasting and important effect on the
market.

The Microdrive is another addition to the growing list of
improvements and expansions available lo the users of home
computers but the new ideas in other areas mark a major shift
away from the traditional market base.

Since Sinclair Research began selling its first computer by
mail order, that has been the traditional distribution channel
for both software and hardware. A few specialist shops opened
to begin the move towards over-the-counter sales and W H
Smith gave that a big boost slightly more than 18 months ago
when it began selling the ZX-81 in selected branches.

Other retailers, however have been slow to show their
enthusiasm for expanding the retail outlets, possibly because
their experiences with machines other than Sinclair did not
encourage them.

Two developments from Prism Micro Products are likely to
ensure that retail outlets begin to expand rapidly. Prism is a
sister company of ECC Publications, which publishes Sinclair
User, but we make no excuse for considering that the company
plans could lead to a revolution in home computing.

The rack-jobbing system and the Romox cartridge termi-
nals are detailed in the news pages. Both will have the effect of
making software much more easily available to the consumer
and thus put home computing on the way to becoming a major
leisure interest.

As shown in the recent Economic Intelligence Unit report

the United Kingdom has by far the biggest market for home
computers in Europe. Easier access to software and hardware
will make sure the U.K. maintains that position.

Both systems take many of the difficulties of selling soft-
ware away from retailers. In the rack-jobbing system the
retailer has only to be sure that sales will be sufficient to cover
rhe costs of providing selling space. Decisions about which
lines to stock and which to cease to stock will be taken out of
their hands.

The Romox system will have similar benefits, with the
added advantage that decisions by software houses about
which programs to publish are made less crucial. New lines
can be transmitted to the terminals and it can then be left to
the consumers which they wish to buy, giving them a greater
choice. It will also reduce the security problems of hole
large amounts of valuable programmed cassettes.

As the recent theft of machines from Prism showed, thieves
are beginning to appreciate the value of goods in the home
computer market.

As stated here in previous months it is moves like these
which are needed if home computing is to become as popular a
leisure pursuit as photography or video.

A result of these changes will be that mail order will no
longer be an important feature of the market. It will no doubt
be retained by the smaller companies with confidence in their

products but for the most part sales will be through retailers
with a distribution agreement with one of the growing number
of distributors.

Another point made in previous issues is that the market
appears to be following the example of the record industry,
with software companies turning away from writing their own
programs and marketing those of others. A more accurate
blue-print would appear to be that of book publishing. That
suggestion has been reinforced both by the Prism moves and
the establishment of the first agent for software writers.

Neil Gibson and Co is offering to assess programs and
arrange the best deal with a software house. The software
house will then deal with marketing, having an agreement
with a distribution company which will then deal with the
retailers.

All that should be good news to enthusiasts who live outside
the main population areas who have had to sufTer the vagaries
of mail order without having the opportunity to see what the
games look like before buying. London has been well-served
with shows at which most of the software producers have
shown their products and the north has been similarly well-
served with shows at Manchester and Leeds. People in Wales
and Scotland, however, have had either to travel long dis-
tances or to trust to small retail outlets.

For Scottish enthusuiasts that should change in September
when the first large ZX show is being staged near Edinburgh.
Sinclair User will be raking the roadshow there with its advice
stand and displays of games from the magazines and others
should be able to provide a good day for the Sinclair-starved
people north of the border.

SINCIjMR tJSKR September !$83

Which Company...

f$%

3

s

£>

has had all its games in the Top Charts.

Has received these reviews:

A masterpiece of programming C.V.G.

Brilliant, Brilliant, Brilliant .... ! P.C-W.

I've never stopped playing it PC. W.

The best and most original game seen for the Spectrum

Another 3D Winner Sinclair User

Sinclair User

Archetypal

Your Computer

The most outstanding thing you'll see for a long time one of the most

beautiful graphically to be seen on the Spectrum P.C.W.

If I had to choose one programme to impress an audience with the capabilities
for the ZX81 , 3D Monster Maze would be the one ZX Computing

The most impressive graphics you are likely to see on the Spectrum

cm

must commend .... for working to set new high standards for
software ZX. Computing.

Writes, produces and markets all its own programs.

Doesn't employ 1 7 year old Porsche drivers.

Produces a game released nearly two years ago, which is still the No. 1
best selling ZX81 game.

Has its products available in Smiths,
Boots, Menzies, Spectrum shops,
and all good computer stores.

Answers on a postcard please to ... .

P.S. What is Bogul?

SINCLAIR USER September 1963

4*

.#

1

I -

ftT 'THE GRAPHICS

ARE TRULY < //t
IMPRESSIVE"

Computer &
Video Games

The all-time best-selling arcade game
for the 48K Spectrum

* Amazingly fast arcade action! Includes: * Training Mode and

* Unique Customising Feature. The fastest and most exciting
game for your 48 K Spectrum.

"Melbourne House is fast gaining a reputation for classy
products, and this is no exception. Penetrator is unique in its
customisation features and will astound ttiose who like to
sneer at arcade-style games played on home computers. 1 '

PERSONAL COMPUTFR WORLD

Penetrator is written entirely in machine language and takes
up almost all of the 48K memory- If you have a 48K Spectrum,
then you must have Penetrator 1

Order i to- 1 ) I Ti Utitti B«tf Sr«n wcrt
imtnSEH

Correspondent* 1a
Melbourne Mnific Chiwnh *ard.
Tnnj.lHertfwdshiraHr73 5l.LJ

AH Melbourne hws*C)Fi5£tt*sflf1i»are is
uncnnditinnalrv tjuarantBed 3?aips;
nuirundlMl

liidr: enquiries wkSflW

~ | Please send me pjl \'tt*b \at!tt#*H ut
Fldiv ?PP1 re

4W SPECTRUII

n TheWtfbil 6M.95

^ Penetjator E5 9b

| Terny-tekril *& E6.95

D M*uunie fc*n ES.S5

£

PlMH a«M 8Gp fee post and pack L BO

TOTAL I

I sfitl&se my ["1 cheque

□ rtsnerwdei Icr

PleaiE debil mv Acc-ci: cue No

Eiptjy Date

Signature

fume
Address

Poyocde

Access enters em In
I'c leprterttd iBrmjjrt rm dui

SU9C

SINCLAIR Ai

»]»

-ONS

MAJOR PRICE BREAKTHROUGH!

MicroCare keeps your
computer humming!

Spectrums and Dragons only £ 19.90 (inc. p + p)
ZX81 only £12.50 (inc. p + P)

Fully guaranteed for 12 months.

No, you're not dreaming] Those are the prices charged by
MicroCare for repairing any electronic fault, however serious,
in the above computers. They are ££££££' s below the price of
Sinclair's repair service, and we give a guarantee?
We'll return it promptly, and we'fl quality check your unit
before it leaves our service centre.

We have the experience it takes. We have the parts on hand. So
act now. Let MicroCare get your computer humming again!

When sending in your computer, please enclose a brief
description of the fault, and make sure that your address is
clearly indicated.

Cheques to be made payable to MicroCare,

Orderref: MCI £19.90inc.P + P
MC2 £12.50inc.P + P

FANTASTIC

ZX81 & SPECTRUM

SST SPEECH SYNTHESISER

SIZE3 1 A"x5 3 A"x 1"

if Making amazing speech effects with
your ZK Spectrum.

if specially designed for use with your
Spectrum. Just plugs in. no dismantling
or soldering

if No power pack, leads, batterresor other
extras.

if Ample volume from burli in loudspeaker.
Manual Volume Control on panel. Can
be plugged in to existing hi-fi syitem.

if Uses no memory addresses.

'if Free Dictionary of Sounds.

SSI SPEECH SYNTHESISER £39.00 plus60p P + P

FABULOUS SINCLAIR
ADD-ON OFFER FOR
ZX81 OWNERS

These are [he re<al Lhmg. 7X81 memory
extensions made for the U'nA and specifurnlly
screened to stnp radio interference

* no solder int)

* easy to fit

■* i Imply plug in

* no loss of memory through wobble
or white out

Fully Guaranteed for
12 months

MEl -16USA E15.9? plus WpP + P

TAPE LOAD
ANXIETY?

Vu load takes the frustration out oF loading
your ZX8I or Spectrum programmes

* helps to ensure programme load
every time

* monitors tape output level

* gives positive save indication

* detects blank tape without
disconnecting cassette wires

* ready to use - no wiring
TL ET9.99 pJui 60p P + P

MICRO TAPE

save it - first time on American mtcrotape

* Spec ial ly designed for use with micro
computers

* Low drop out occurrence

* Uniform coating

A High saturation level

* So good, we can guarantee them for
12 months

AUDIO DIGITAL AD.C12 - 55p;

AD.C 1 5 - 60p; AD.C20 - o5p; + 40p P + P

SINCLAIR USER September 1983

Spectrum
T6K-48K

+
*

Wftfi our ME48 memory
expansion add-ons your
Spectrum tan increase its
capacity by up to three times.
* no solder ing

easy to f Jt

simple to plug in

fully guaranteed

no loss of memory through wobble

or white out.

WH. BH<.ire-c»deririt) your SpctlfuiTi add-on please ctietk
mtiiJi ^pctjtrumyuijnjvicinytiur [»i!Cisiun Attlie back
ul Ll*: ZX Spetli u«i LH*e rnrtalk. tunijtl sLrirji ante dMify
viewed. In [fir scries A l\v sfrint icrjdrdtjFKj tlic suirji is lilt
same w>dth as ffie strips In (Me scries B the- strips are tw*e
ai iA/«de 3i ttie ifacF Dptwetn.

SPECTRUM

MCI6-4B Series A £34.50 plus 60p P ■ P

Serlej fl £20 50 plus 60p P + P

ME1 6-SO Serlei B £46.00 plus 60p P + P

ZX81

MEl-64 E44 25 plus 60p P + P

FITTrNG/TESTING SERV/CE. While you

wait, personal callers Monday f-nday 9.30-

5 00, O.00 By return of post E7 CO

r^"

LEVEL-VU PRISM

Allows you to see your tape counter
without moving from your seat!
+ attaches easily to recorder body
or lid

* fits most recorders including
Radio Shack, Vic- 20, Atari

* greatly magnifies counter
numerals

LVPE3.99 plus40pP + P

COMPUTER STANDS

POWER BASE

Raised stand for ZX81 and Spectrum.
Fitted LOAD/SAVE switch, and
power ON/OFF for screen clearing.
Saves wear and tear on connections.
Front lip holds computer in place, Nc-
soldering, comes complete with ail
necessary plugs and cables.

Spectrum ref. PBS! £13.50
plus 95p P + P

ZX81 ref. PBZX8! £13.00
plus95pP + P

WOBBLE STOPPERS

Ai \jt<i r a fool proof method of avowing ZX8I
wnrteouts caused by K-am-Ratk wobble. SirnpJy turn
trie plastic thumbscrew until uric Ram-Patk is heid

hrmly ^</riirts[ ihe2xfir. No Mldenng no stick-on
pieces, just common sense!
flat or tilted models.

■

" ; ''W

Small ^

HB^S^^tfl^^^

tflted for

ZX8T and

Ram-Pack

ref. STW

plUSrSQp F-l-F

£6.25

COMPUTILT STAND

Designed to tilt the computer to a

better working positron. Front Up
holds computer in place. Also useful
as a document stand when entering
information

Spectrum or

ZX81 ref. CS1 £4,50

plus60pP + P

Large

flat or fitted
for ZXfll and Ram-
Pack and Printer ref

tw£5.75 LT\A/£6,75pJuirsopp + p

f£Wt\ 9fT*m ? ADD

I
I
I
I
I

ALL fTEMS NORMAL I ¥ DESPATCHED
WW I HIM 24 HOURS

Please tick appropriate box to order your
Computer Add-On.

MClQ MC2Q Mtl6USAQ

ME 16-48 Series A U Series B [J ^ D
?lQ ADCI2Q ADC15n ADCZOQ
ME 1680 Series sQ MEI-64Q

lvfD PBStn PBZxein c^iD

swn iiwn iwq ltwq

ONS Trade enquires welcome

MB- Add Post and Packing to the price of each item

P enclose a cheque or postal order for made

payable/crossed to Computer Add-ons or MicroCare ur I
wouid Jike to pay by Access rT'1 or Ba relay Card f&f

Name

and 1 enter my number a nd signature accordingly.

* ^Itow^e ddyj fur tlel'wcry

- n

Address

Signature .
□ate

Occupation .

sus>

COMPUTER ADD-ONS

SINCLAIR USER September 1983

LOAD

* VERIFY . . ENTER . . ATTACK . . RESTORE,

■ • • ■

INVERSE

UST

MOV

©

H

a.
c

ui

E
P
*-.

£>
C

ARMAGEDDON*

The cities are crumbling
u nder the co n Li nual

attack waves- As defence
eontr oiler you will be
obl iterated with them. Unless.

MISSION IMPOSSIBLE"

5pace mines, force fields,

meteor storms and lethal

enemy ships conspire to stop

you reaching the astronauts

itranded below, but . , . you "*<

have to return them 10 the I

MUNCHER GROUND ATTACK*

Maz"e h rate and chat* game, (n [he labyrinth the flesh

Munching gets harder as eating aliens have been It

G&OLfO ATTACK
<ZX|
Finally. . . a version of the

you progress. Power pi 1 1 j,
random males, blue ghosts
ane smooth arcade action.

SLIPPERY SID*

Take Sid on a sneaky trip,
eating frogs and magic

eating jliens ha u e been locate J,
penetrate ciiei'" defences,
tjeitrgy fueJ supplies and mus'lc

silos-S skill levels, miry effects,

CYBER RATS*
The meanest metallic menaces
to march aCf OSS the screen,

tarZXfll owners, true

m u shf oom s , but ^atcfl out, if he moving so fast They're almost a hiu

•

EXTERMINATOR
Robot Intelligence has surpassed
humans.! using homing missile, move
and i\re In eight direction!, avoiding
indestructible robots With homing

m<M| les , to sav e the laic of the hum an race.

h in tti e garden wa.ll he ' 1 1 be si ck
Hl-stormg. 5 skill levels.

STARSHIP ENTERPRISE*

Starship simulation, save the
galaxy, intriguing adventure w^n
arcade action. JD Hyper-warp, real
time Alien attacks, Over 30K of
m ae h i ne code and BA S I C (48K onl yj .

SPECTRUM

Hi~res movement, Hi-score tonus,
BRAIN DAMAGE* -r

The master computer detects
you patrolling its Circuits m your
proton -panzer. Defend yourself
agnnst] typel of electron
rapiers or escape through the

hyper gate to another cincuit.

3 skill levels..

Invaders £3;9S

Asteroids £3:95 I Munthe

Alien Dropout S-l-.f 5 I Ground

M uncher £ 3 :95 ■ Mttilo n

SPECTRUM Brain D;

Exterminator £5 :9S || A^mage

Cyber Rats £5:95 ■ Orbiter

I enclose chequefpostai order 'or:

I Munther£5:9'&

I Ground Attack £5:95

I Mission Impossible t. :■ 95

Brain Damage £&:"?b
I Armageddon £5;9S

■ Of biter £5:95

Send cheque or postal order to: SltVERSOFT L TD
London House 271 .■'273 King S v eei, London W4
orcomplete your
Access or Visa No.

Addr«u

•Joystick option available.

Sinclair User Club =

Discount on
games for
both machines

WE CONCENTRATE on

games for our special offer to
club members this month.
With a discount of 20 percent
there are real savings an cas-
settes which have proved
popular Tor many months.

There are four games in
all, two for the ZX-81 and
two for the Spectrum. ZX-81
owners can make savings on
the ingenious 3D Monster
Maze from New Generation
Software, the first three-di-
mensional game for any Sin-
clair computer, and on the
Quicksilva Defenda.

The Spectrum games are
both ftom the small new soft-
ware house Quest Micro Soft-
ware. They are the interest-
ing space adventure games
Black Hole and Violent
Universe,

Full details of the games
and their usual and offer

prices are shown below.
Members should avail them-
selves of the offers in the
usual way by sending orders
and membership cards to the
relevant suppliers.

Quicksilva is at Palmer-
ston Park House, 13 Palmcr-
ston Road, Southampton.

New Generation Soft-
ware is at 16 Brendan Close,
Oldland Common, Bristol.

Quest Micro Software is
at 1 1 9 The Promenade, Chel-
tenham, Gloucestershire .

As usual, the offer is open
only to members of the big-
gest club in Britain for users
of Sinclair machines and will
be available until the end of
September. To help new
members to take immediate
advantage of the savings this
month, they should include
their order with their mem-
bership application.

People join from
all over the world

Membership
passes 1,000

THE SINCLAIR User Club
is continuing to grow stead-
ily. More than 1,000 mem-
bers have joined although the
Club has only been running
for less than 10 months.

Club membership started
in Britain but soon readers of
Sinclair User in other coun-
tries began to send registra-
tion forms- The Club now
has members in Zimbabwe,
the Netherlands and as Far
away as India-
Members are quick to ac-
cept the offers which are
made through the Club
pages. More than 30 orders
were made for The RD Digital
Tracer since it was offered in
May. The device was marked
down from £49.95 to £45.

The Club offers members
a wide variety of good-quality
products and in the past it
has offered software from
Quicksilva, R and R Soft-
ware, and PSS. Offers have

ZX-81

Quicksilva

Defenda
New Generation Software

3D Monster Maw
Spectrum

Black Hole

Violent Universe

Usual
price

£3,95

£4,95

£5.50
£5.50

not been limited only to soft-
ware. Hardware,, such as the
Hilderbay loading aid, has
sold well through the Club.

The telephone helpline is
another service which is for
all members. If you have a
problem with a program or a
query about your machine
you can use the telephone for
a quick answer. The tele-
phone number is included on
the Club cassette newsletter
which is sent to all members
once every two months. It
provides programs and infor-
mation of interest to all Sin-
clair users.

The Club offers an-
nounced this month are open

only to members. Those who
would tike to join can also
take advantage of the offers
by including orders on the
registration form. The offers
are available until the end of
September.

Offer
price

£3.15

£3.95

£4.40
£4.40

MEMBERSHIP
FORM

I wish to join the Sinclair User Club and enclose my
subscription of £12

Name t , ► , , » , .,

Address , , .'.

Which computer do you own?

ZX-81 O Spectrum

Send your coupons to Sinclair User Club, ECC
Publications, 196-200 Balls Pond Road, London NI
4AQ, Cheques should be made payable to Sinclair
User Club.

SINCLAIR USER September tBH3

11

=i Sinclair User Club

Britain

Aylesbury ZX Comptiur Club: Ken Knight, 22 Mount Street,
Aylesbury (518! or 630867). Meetings: first Wednesday and third
Thursday of the ntnnth.

Basildon Microcomputer Club; Roger Sims, Wickford 63032, after
6.30pm. Meetings ever}' other week on Tuesdays From 7.50 to 10pm at
Healey Management Services, The Hemmels, Laindon, Essen.

Bristol Yatc snd Sodbury Computer Club: 99 Woodchester Yate,
HristoB, BS17 4TX.

Colchester Sinclair Usee Group: Richard Lown, 102 Prettygate Road,

Colchester CO 3 4EE.

Doncastcr and District Micro Club: John Woods, 60 Dundas Road,
Wheal Ley, Doncastcr DN2 4DR; (0302) 29357. Meetings held on second

and fourth Wednesday of each month.

F.astwood Town Microcomputer Club: E N Ryan, 15 Queens Square,
Eastwood, Nottingham NG16 3BJ.

Edinburgh: Edinburgh Home Computing Club. John Palmer (031 661
31S3-) or lain Roberteoi! (0.31 441 2361).

FZUG -Educational ZX-80-B1 Users' Group: Eric Decson, Highgate
School, Birmingham B12 9DS.

Fumcss Computer Club: R J C Wade, 67 Sands Road, Ulvcrston,
Cumbria (UlvatOJl 55068). Meets every Other week on Wednesday

evenings.

Glasgow ZX-8Q SI Users 1 Club: Ian Want, 107 Greenwood Road.,
Clarkston, Glasgow G76 7LW (041 638 1241), Meetings: Second and
fourth Monday of each month.

Gravesend Computer Club: co The EHtra Tuition Centre, 39 The
Terrace, Gravesend, Kent DA 12 2BA. Hi-monthly magazine and mem-
bership card.

Bwmit ZX Micro User Club, Sussex: Paid King (Hassocks 4530).

Inverclyde ZX-81 Users' Oub: Robert Watt, 9 St. John's Road,
Goufock, Renfrewshire FA19 IPL (Gouwe* 39967). Meetings; Every
other week on Monday ai Greenock Society of the Deal", Kelly Street,
Greenock.

Krighley Computer Clubs CoLn Price, Rcdholt, Ingrew, Keighley
(6031331-

Lambeth Computer Club: Ruben Barker, 54 Brixton Road, London
SW9 6BS.

Liverpool ZX-Computcr Centre: Kekh Archer, I" Sweeting Street,
Liverpool 2.

Mersey-side Co-op ZX Users' Group; Keith Driscoll, 53 Melville
Road, Booths, Metseyside 1-20 GNE; 051-522 3163.

Micro Users.* Croup: 316 Kingston Road, Kwell, Epsom, Surrey KTI9
OSY.

Newcastle (Staffs) Computer Club; Meetings at Newcastle Youth and
Adult Centre, Thursday, 7.30 to 10 pm. Further informaiitm from R G
Martin (6782 62065).

North Hertfordshire Home Computer Club: R Cruichfield, 2 Dur-
ham Road, Stevenage; Meetings: first Friday of the month at the
Settlement, NeveHs, Road, Letchworth.

Northern Ireland Sinclair Users' Club: P Gibson, 1 J Ftotpote* Park,
Newtownards, Co Down BT23 4BU,

North London Hobby Computer Club: ZX users ' group meets at
Nnnh London Polytechnic, Holloway Road; London M7 each Monday,
6pm.

Nottingham Microcomputer Club: ZX-30 SI users 1 group, G E

Bastivrd, 9 Holme Close, The Pastures, Woodborough, Nottingham.

Orpington Computer Club: Roger Pyatt, 23 Arundel Drive, Orping-
ton, Kent (Orpington 20281).

Perth and District Amateur Computer Society: Alastair MacThei-
son, 134 Oakbank Road, Perth PHI IHA (29633), Meetings: third
Tuesday of each month at Hunters Lodge Motel, Banklnol.

Regis Amateur Microcomputer Society: R H Wall is, 22 Mallard

Crescent, Pagham, Bognor Regis, West Sussex P021 4UU.

Scunthorpe ZX Club: C P Hazteton, 26 Rilcstonc Place, Bottesford,

Scunthorpe; (0724 63466).

Sheffield; Scmlh Yorkshire Personal Computing Group. Enquiries to R
Aldcrton (0742 20571), S Gray (0742 351440), P Sanderson (0742
35 1 695),

SitliDgboumc: Anurag Vidyarth (0795 73149). Would be interested to
hear from anyone who wants to siart a dub near the Medway towns.
Stratltird-on-Av«u ZX Users* Group: Chris Parry, 1 6 -SackvilSc Close,
Stratlbrd-on-Avon, Warwickshire.

Swansea Computer Club: B J Candy, Jr Gorton, Killsy, Swansea
(203811).

Swindon ZX Computer Club: Andrew Banlett, 47 Grosvenor Road,
Swindon, Wilts SN1 4LT; (0793) 3077. Monthly meetings and library.
Sutton; Sutton Library Computer Club, D Wllkins, 22 Chestnut Court,
Mulgrtve Road, Sutton, Surrey SM2 6LR.

West Sussex: Midlimsi and District Computer User Group. Enquiries
to V Weston (073 081 3876), R Armes (073 Ofll 3279).
Worle Computer Oubi S W Rabone, Iti Castle Road, Worle, Weston-
super-Mare BS22 9JW (Wesfon-super-Mare 5I306H). Meetirigsj
Woodtprings Inn, Worle, on alternate Mondays.

ZX-Aid: Conrad Rne, 25 Cherry Tree Avenue, Walsall WS5 4LH. Please
Include sac. Meetings twice monthly.

ZX Guaranteed: G A Rubker, 29 Qmkkrton Drive, Unswerthy, Bury,
Lancashire, Exchanges, information and programs throughout the coun-
ty.

ZX-SO/ZX-S! Users' Club: PO Box 159, Kingston-on-Thames. A postal
club.

Overseas

Belgium: ASBL BDMA Belgium National Sinclair Club; P GfanitSOfl,

Rut.' l>e l 1 Epees,rraaT, 14, 1200 Bruxelles.

Belgium, France and Luxembourg: Club Sinclair, Raymonj; Bet/, 3-H

Chcmin du Moulin 38, H-132N Chain, Belgium (322 653746H).

Belgian User Group for Sinclair owners (BUGS); Op de Beeck, Patrick,

Drabstraut 144 ? 2510 Mortsel.

Micro-Europe Club; R Rett, Chcmin du Moulin, H132J3, Ohain, Bui

gium. Telephone: CCP 000 0846556-37.

Denmark: Danmarks National ZX-8081 Klub (DNZKK Jens. I.arsun,

Skovtnosei r ei 6A2Q0 Slagelese, |ios.i giro 1 46 24 66.

ZZ-Brugergruppen i Danmark, Hoks 44, 2650 Hvidovre, Gratis medlems-

kab og yraiis. btad ill enhver intcrcsscret,

J Niels-Erik Hartrnynn, OZ-ZX-Radioamator, Bruger Gruppe, Brcdgadc

25 DK4900, Nakskov.

Hast Netherlands: Jonathon Meyer, Van Spaeri Straai 22,6524 H.N.

Nijmegen; (0SO 22.341 1).

Germany: ZX-80 Club, a postal club; contact Thomas Jeacyzyk.

Ilameln, Potttoch 65 D-32S0 Hameln, Germany.

Indonesia: Jakarta ZX-S0/S1 Users' Club, J S Wijaya, PO Bos 20, jkukg,

Jakarta, Utara, Indonesia,

Irish Amateur Computer Club: Martin Stapler on, 4B Seaeourt,

Clomarf, Dublin 3. (331304).

Italy: Sinclair Club, Vic Molimo Vcccho so/P, 40O26 Imola, Italy.

Gcnova Sinclair f]lub; VitiortoGioia, Via FCorridoni, 2-1, telephone 01

3125 51.

Micro-Europe: Relgitim or Club Paris-Micro, !9 Rue dc Tilly, 92700,

Colombes, France; associated with Club Micro- Europe,

Republic of Ireland; Irish ZX-8081 Users' Club, 73 Cnoc Crionain,

Hailc Ai1ik, Ciiaih 1.

Singapore: Sinclair Users' Group; Krii- Mortimer, ID Wiltnei Court,

l^eonie Mill Road, Singapore.

Siiuib Africa: Johannesburg ZX-80-81 Computer Users' Club: S Lucas,

da Hocchst SA fPty) Lid, PO Bok B692, Johannesburg,

Johannesburg ZX Users' Club; Lefiseft E R Fisher, PO Bojj 61446,

Marshallsitown, Johannesburg.

Spain: Club Nacional de Usuarios del ZX-rjl, Joseph-Oriol Tomes,

Avda. de Madrid, No 203 207, 10, 3a esc, A Barcelona- 1 4 Tspana.

International ZX Spectrum Club: Gabriel Indaiecio Cano, Sardana, 4

atrico 2a ? Sao Andres de la Barca, Barcelona. Send international reply

coupon. Produces a bi-monirily rnaj^iyuie. Spanish ZX Micro Club;

Apariado Ifll, Alicante (Costa Blanca), Spain.

ZX Club Spain; C BetutO PO Box 325.3, Madrid, Spain,

Swedish ZX-club: Sinclair Datorklubbcn, Bos 1007, S-122, 22 Ens

kede, Sweden.

United States; Bsj* Area ZX-HO User Group, 2660 Las Aromas, Oakland

CA9461 l.-Harvard Group, Bolton Road, Harvard MA 01451: (617 456

3967).

12

SINCLAIR USER Stpitmiw I9ifj

Extend your 16k
Spectrum to 48k for

just£2300.

And get a Free
program wort h£4-50

into the
bargain.

SP48, 32K Memory Extension with Program - £23.00

Now. qui SP48 offers even better va3ue.

Because now we're not only offering, you ihe facirily to up-grade your
16K Spectrum to 4SK w« T re also offering you the opportunity to be able to utilise
this t^stly extended metnotyquiclduandeas^i

For £23 all you need to do is plug the chip set Into the sockets provided
by Sinclair on your issue 2 {or £35 for issue 1) and you haue a standard 48K
Speorrurn fuJky compatible with all Sinclair add-ors and very low in power
consumption.

There is no soldering required.

Fitting and removal are easy

And the SP48 carries qui full warranty and s upgradable, on apart
exchange basts, to SP80.

Then all you reed to do is LOAD our specially written 48K guide
program. 'Beyond Horizons; and your 4&K computer will guide you through its
memory

With no need to labour through manuals.

This will save you time, because we all know how,' easy ft is to get lost with
memory maps.

SP80 Pa ged 64 K memor y extension — £46

The fitting, power consumption and add-on compatibility are identical to
the SP4& (Issue 1 feistan £50).

It can be used as a standard 4SK. but software instructions can switch to a
second page of 32K

Bu! this Is no* recommended brrhecompkte beginner

\et it is of tremendous benefit to the serious user And an SP8G FORTH
compiler wil] be available in late September.

For a fit and test service at our premises £1-J, and by registered post £7.

MAXIMEM ZX8L 32K - £39 (PLUS ONE USED IK
ZXSl ) 64K 7- £597PLUS ONE USED 1KZXS1)

The MAXIMEM 32 and 64K is a modified ZX81 and not just a RAM
pack ftfits inside thecal.

We also give a six- month guarantee on the computer, regardless of the
<ige of your trade-sn ZXSI.

Tlie extra memory uses only a quarter of the poujer consumption of a

SINCLAIR USER September 1983

Is the manual past Chapter 24 a mystpry to you? 'Beyond HoriafHYs'
shows 48K Spectrum users how to HihK and POKE systems
varicthl es, how to inanipuJd.li' t fie display fi le. ht w lo control i he
attributes, hnu,' to find out how much spare memory is left and much,
inut.li mote. With thf SP48lhfe program is fr«p, On its own, £4,50.

16K plugin memory, and does not interfere with any Standard add-ons, such as
printers RS232 or other interfaces.

ZX Slowlo ader — £10

TheZXSlwIuadtir is a software masterpiece that will help you to LOAD
ZXfll programs onto a SpectruTn. saviny hours of typing time

The Next Ro botic s Exclusive, The Tric kstick

This new joystick fiu refutation in computer games control With our
Trickstick from one to eight players will be able to playsimultarieousry
It will be on sale soon - seeournert advertisement.

Alii psreducts on Liis order form are in rfock at the rime of going lu press. Same day dispatch

for phonod Access and Visa ortfers.

To Egst London Robotics Ltd: Mease send by retain (flek items required I

LJ MAXIMEM :*2K I £.19 !64K(E59H lkZXBl

D 5P*8fiw«l£3SKfai»2£2S

LJ SP80 (Issue I C50) (issue 2E46I .

LJ BLDWLOAOFRtlO

C-l ^BEYOND HORIZONS' 1 program £450

I I fteec&takxjue'lSAEiinly) , . ^^_

Pristaqei ) 6Sp, i endow acheque/POfor

n

n

mrr

n

_MyAcC(*sS/VisaMn. »

ra s

Name.
Addles

East London fafcc*esLKL,Gate 11. Royal Albert Dock, London £16.

'M Hourlnfnmnaijon Servtet;

Tel- 01471 3308

24 Hour Access and Visa ordering

TeL 01 4744715

Special EnqutnexlU 01474 4430

Telex: S813271

suitjai

EAST LONDON

3DEETISS!

13

Att YOU H££D TO CRACK
MACHINE CO!H

For Hie Spectrum m & *s*

lest took for Spectrum & ZXSIfTSIOOO

The ultimate professional tutor and de-bug program.
We wrote this to heJp us write Machine Code J!

• Test and Drspfay Machine Code Instructions as they're written

• Ideal far both the beginner and expert • FuJry cTocumentsd
with 32 page tutorial • HEX: Decimal converter as standard •
PIUS • Character Generator of unbelievable quJFityi!

full screen etfitor/assembfer for Spectrum

The latest and most comprehensive Editor/ Assembler
yet produced.

• Full 1 Screen 42 col. mpurJtext editor * Assemble to
screen/pnnter and or tape ■ Assemble derivatives DEFM r DEFS,
DEFW. DEFB, DEFL ORG, EQU, END • Comprehensive syntax
Chec* » Binary, Octal, HEX & ASOf constants * Will even
operate at a simple word prnre^sor * Fully documented
instruction bogk * Ffys Character Generator , . . plU5 r many,
many more, all ycuj've ever needed

Master toot ktt for Spectrum

• Re-number facility • Defete copy and move block function •
String search and substitute facility • Variable dump * Cross
reference * Trace function * Real time crock and a/arm system.

HOiT TO: OXFORD COft/fUTER PUBLISHING LTD., P.O. BOX 99. OXFORD

FFea.se send ' Machine Code Test Tool ZX81

Machine Code Test Tool Spectrum
Editor Assembler Tool Kit

£9.95 CA-fi, ^ny J ;ir marc £9.25 (PciHiJgr 1 Ircc UK only). Ovtfieas add

i i pc program

NAME , . .

ADDRESS

•*iio wjiMtt - rnom ■Tios'fiffincnpi

::l if/ I H. Srrtfi ami Other ictailc! ACCESS CARD NO

Aj^o ^nom Byffci Wv_^l'. 5li if-Hl ' i- I"

E3

tXPlRV DATE

isiiiE)g)@®(§i®i)(i)isiii(c)®ia

^ al. ll Jl l U- fgf!fgWrf^^W^WifTkg

THE MICRO POWER SPECTRUM

'ADD-ON'

® BrincTSo ^' to your Joysticks!! -0
® Make your beeps BEEP!^
Create Multi-
^t ^Channel Sound Ff ects ! pj

nTT ill JJ i J i ii i' it""'! 1 i 1, •'' il i' l 'M n

The new Spectrum Add-On gives you
• ONE Atari /Commodore type
Joystick Port
TWO Potentiometer Joystick Ports
Amplification of the standard sound output
THREE -CHANNEL, PROCESSOR INDEPENDENT,
PROGRAMMABLE SOUNDS— music, gun-
shots, explosions etc
Demonstration tape t 4 ^

and full operating
instructions

®

Note: The 'Add-On' simply plug*

&tr Bight orrtc tfie bach of

y&ur Spectrum.

No soldering raqmrrnd

.^JOYSTICKS

^^^ \ Potentiometer -Type!

BUUXfMS KIT find, cA Sti) £5.95 f ^

""nriol

MJTE- We stutMaml ma i-ket) PROGRAM POWE
SOFTWARE for the BBC, ACORN SPECTRUM and
DRAGON 32. SendS.At 'Or ayurop'iai* cgiakiguf!

8/Ba REGENT STREET.
CHA^ILALLERTON,
LEEDS LS74PE

Te . (0B3?I S83'B6or 696343

Bio)®®®®©®®®®®®®®

/tt 13 he cracked the Cube

15 he's mastered the micro wave

Patrick Bossert (author of You Can Do The Cube) and Philippa Dickinson

Atl ELECTRIFYING SELECTION OF EA5ILY PROGRAMMABLE ORiGftlAL GAMES FOR
BBC (models A and 3), RML (580Z and 480Z), ZX Spectrum, ZX81

£150 (illustrated) /&

Starting 1 September: A micro competition with macro prizes I i

PUFFlfl YOUNG PROGRAMMERS OF THE YEAH

in conjunction with Sinclair Research and the national Association of Youth Clubs.

* Three age ranges * Mine Sinclair ZK Spectrum or equivalent software to be won

* 50 runner-up prizes of Penguin micro computer boohs in each section

Build up on your BA5IC now,, . the search is on!

Research

*

Entry forms from: Children'5 Marheting Dept {51 H COM P), Penguin Boohs Ltd., 5 56 Kings Road, London 5W10 0UH

~J

14

SINCLAIR USES September 1983

Arcades
come top
in PSS

THE WINNING programs
in the PSS programming
competition are all arcade
games. The competkon was
to design a program using the
PSS MCoder compiler for
the ZX-81 or Spectrum. AU
the prizes were given for
Spectrum programs.

First prize was £500, won
by Stan Cartwrighr of Car-
diff". It was for a program
called Elektro Storm. The
second prize of £250 went to
Chris Woods of Chessington,
Surrey for a program called
Panic,

The winning program may
be marketed by PSS at the
end of this year,

Scots get
first big
exhibition

THE FIRST BIG Scottish

microcomputer show is to be
held at B run ton Hall, Mus-
selburgh, on Saturday, Sep-
tember 17.

Jill Donnachie, the organ-
iser, says: "The ZX Club has
put on a show previously but
it was very small. This will
feature all the big names,

"We have tried to get as
many small computer com-
panies as big ones to take
stands. We also have a num-
ber of software companies
booked and we are looking
for more hardware manufac-
turers to take stands,"

The Sinclair User Road
Show wit] be at the show. An
advice stand and display of
the games from recent issues
of Sinclair User and Sinclair
Programs will be there ,
together with the latest issues
of the magazines.

The Sixth Personal Com-
puter World Show is to be
held at the Barbican Centre,
London from September 28
to October 2.

Some surprises in
the Microdrive

THE MICRODRIVE for the
Spectrum has finally been in-
troduced, more than a year
after it was first announced.
The specifications of the final
version bear a close resem-

blance to those given origin-
ally with the addition of the
inter face.

The expansion module is a
black sloping box which fits
under the Spectrum and can

NIGEL
SEARLF.

"Praying for

the $mec*m
of the Micro-
drive."

Best in Europe

THE U.K. leads Europe in
the sales of microcomputers

but West Germany is expect-
ed to dominate the market in
the nest five years. That is
the view of the Economic In-
telligence Unit, following a
review of sales in the major

Learning move

A NEW RANGE of edu-
cational software for the
Spectrum is to be launched
jointly by Sinclair Research
and Macmillan, publisher of
educational books.

The software will be aimed
specifically at the five-to- 11-
year-old age range and will be
the first range of software to
be designed for use both in
the home and at school.

The programs will be de-
signed for use either on their
own or along with the Mac-
millan publications from
which they are derived. The
first batch of cassettes will
appear in a month and more
titles will be added in 1984.

markets of the U.K., Ger-
many and France.

It says the U.K. led by a
wide margin in all categories
of micros, workstations cost-
ing between £3,000 and
£10,000, personal compurers
costing between £500 and
j[3»Q00, and home computers
costing less than £500 in
1982. It believes, however,
that West Germany will soon
lead in terms of value, be-
cause of the rapid increase in
sales of the most expensive
workstations.

In 1982, comparative sales
showed that sales of work-
Stations in Germany were
worth £60,7 million com-
pared to £60 million in
Britain and £31 million in
France.

The part of the market in
which Britain is not threat-
ened is the home computer
marker, Britain had sales of
£94 million last year, going
mainly to Sinclair Research,
whereas Germany had sales
of £28 million.

take up to eight drives. It will
cost £49.95 but only £29.95 if
bought with a microdrivc,
each of which will cost
£49.95. Each of the drives
has a capacity for at leaast
35K, so the total on-line
memory capacity is approxi-
mately TOOK,

The Microdrives are con-
trolled by an 8K ROM, the
software for which was de-
signed by Dr Ian Logan.

As well as giving control
over the drives, the ROM
will allow an extended com-
mand mode which will en-
able users to add commands
to Sinclair Basic. The extra
commands would then be
available with the rest of the
Basic commands when the
expansion module is in place.

The 8K ROM will also
correct bugs in the Basic and
operating system of the Spec-
trum by over-writing the er-
rors while it is in operation.

The expansion module al-
lows information to be ac-
cessed from the tape drives in
three seconds. That is slight
ly better than the original
Sinclair specification, which
gives 3.5 seconds as the ac-
cess time for 16K. of 'memory.

At first the company will
be offering the Microdrives
exclusively through mail or-
der to the first 1,000 people
who bought the Spectrum by
mail order last year. In that
way the company hopes to
compensate for the long wait
experienced by some of its
customers in the past.

It will later be offered to
other owners who bought
their Spectrum! by mail
order in stria sequence until
that demand had been satis-
fied. Nigel Seark, managing
director, said that ht.- did not
know when the drives would
go on retail sale as that would
depend on the demand and
the amount by which produc-
tion could be increased.

SINCLAIR. USER September 19btf

15

News

■

Free aid for
programmers

A MARKETING company,

Neil Gibson and Co, is pre-
pared to offer free help to
microcomputer programmers
who are trying to market
their products,

John Courage* who owns
the company, spoke of what
he called Lh blatant dishon-
esty" by software houses to
programmers who offer pro-
grams.

The company initially will
deal with software for any
Sinclair machine. It will offer
programmers free appraisal
and suggestions for improv-
ing commercial appeal.

When a software package
is ready, the company will
negotiate on behalf of the au-
thors for the best deal with
either a software company or
a marketing agency.

Sales boost for
old machine

AN ATTEMPT is bang

made to boost sales of the
ZX-81. Sinclair Research is
making a special offer
through all its retailers selling
the machine plus the RAM
pack and an item of software
for £45.

The company is promoting
it as a starter pack, 'ideal for
the new user. 1

The offer began at the be-
ginning of August. It is to
continue for at least two
months. Sinclair is also giv-
ing away five rolls of printer
paper with every printer sold
in the period.

It is the latest in a series of
price reductions for the ZX-
81 since it was introduced at
£69.95, plus £2935 for the
RAM pack, is March, 1981,

We have moved

ECC Publications, publisher
of Sinclair LW, has moved.
The new address for all corre-
spondence, programs and ar-
ticles is now 196-200 Balls
Road, London Nl 4AQ. The
telephone number for all de-
partments is 01-359 3535.

Prism leads retail
revolution moves

RETAKING of Sinclair
software is being revolution-
ised. Prism MicroproductSj a
sister company of ECC Pub-
lications which publishes Sim-
clair User, has plans for
distributing commercial pro-
grams which will probably
mean the end of mail order

for software in the Sinclair
market.

Il has agreed with the elec-
trical retailer Rumbelows to
establish software centres in
its shops. It also has plans for
a new system of electronic
distribution which will be
test-marketed in Birmingham

'

rm

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r ' WMM

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1

i

§

Hi*;-.-.-. .

■

Smith cuts ZX-81

W H SMITH, one of the

biggest retailers of Sinclair
hardware and software, has
stopped producing its weekly
Top Ten ZX-81 software
charts because il does not in-
tend to buy any new lines of
software for the X"40 machine.

Smiths will continue to sell
its present range of software
but has discontinued the
chart as it feels the sales fig-
ures would be unrepresenta-
tive of the marker.

One reason for not con-

tinuing to expand its range of
ZX-81 software is growing
involvement wirh the sales of
other machines, such as the
Oric and BBC microcom-
puter,

Sinclair User is reviewing
the accuracy of the charts
produced by various sources
arid deciding whether to con-
tinue with the listings. For
the present, however, the
magazine will continue to
show the Top Ten chart for
the Spectrum.

Spe-Llrum

T&p Ten

Last

Program

MoDth

Company

Memory

] Ptnclruinr

3

Melbourne House

48K

2 Jet-Pat

2

Ultimate

1«K

3 Flight SiiiiuLiliuii

1

Psion

48 K

4 Hobbit

5

Melbourne House

48 K

5 Transylvaniaa Twr.

4

ShcparJ

4SK

6 3D-Tanx

f

d'KTronics

16K

7 Horace Gats Skiing

S

Psion/ lW el. House

1GK

8 Ah Uiddums

9

1 n i Lit; lii c

J6K

9 Star-ship Enterprise

-

Silvexsoft

46K

10 Test March

-

Computer RittJs

4SK

Compiled by W H Smith

in the autumn. The software
centres will consist of a shop
display which will be ser-.
viced by Prism. Regular calls
are made by Prism staff to re-
stock the centres and remove
software which is moving
slowly. The system is intend-
ed to reduce the risk for re-
tailers deciding which
software to stock.

The national agreement
with Rumbelows was signed
following a trial in the Home
Counties earlier this year. It
proved successful and other
big retailers are negotiating
with Prism to expand the sys-
tem,

From its base as exclusive
distributor in Britain of Sin-
clair Research products to re-
tailers other than W H
Smith, it has built agree-
ments with most of the soft-
ware houses in Britain,

Electronic distribution
plans result from an agree-
ment with Rom ox j a com-
pany based in California. It
has developed a system which
allows retailers to have a pro-
gramming terminal ai which
buyers will be able to record
blank cartridges or erased car-
tridges.

The terminal will be up-
dated constantly with the lat-
est programs by telephone
line, ReLailers do not have to
stock pre-recorded cartridges
or cassettes, only blank car-
tridges.

It is also claimed that the
system will permit iustant
nation-wide distribution with
no production delays.

Bob Denton, managing di-
rector of Prism T says Rom ox
is a logical extension to its
present software merchandis-
ing programme and to the
Micronet 800 service in
which Prism has an interest.

At present Romox is not
available for the Spectrum
but there are plans to include
it if the trials are successful.

16

SINCLAIR USER September I9S3

HOW to

make your computer

feel at home

You won't find a lower-cost
answer to the problem of housing
your home computer than the MFI

kfnn.imtH-Jii.iiiuT.iiii.mlTn

Desk , . .

A Previous Price£5%99

..-■■■■

U*sB53a

LlJt

Even more storage
space for books and
manuals. With castors
for extra mobility. In
teak style. 31 High x
32%* WW* x 19 W*
Deep.

Sherwood Mobile
Computer Desk
A Previous
Price C74r»S

£29.95

imL,

i save 66%

Keeps keyboard,
cassette recorder
and TV in one handy
unit. Elegantly styled
in teak-effect finish.
31V4 Highx32 3 /*
Widex 19 s i Deep.

You

s av©

%Q°fe

Fold down desk hdgi\*i
extra workingspace and
stows dwjy your
eq u i pme n t when not i n
use, Extra cupboard
with two shelves and
smart glass doof In

tea k ■ st y I e . C as tors too !

34 High i35 Wide x
^i 19 l /'Deep.

Carmen Micro
Computer
Organizer
A Previous
PriceE114.95

£44.95

Puces an? for »|1 attvpibly umls. jnd da im include ccnnpultr eqyipm«irt and wcKswiK. AM 5i3« appnji. Pwviisii!. price' charged in ait A Wembley Park blanch l w s mi nimym of 28 days in She lasl 6 months.
Same itenu may not be available at smaller tarn. Adwrtisemeivt rut appl kable in the NepuUic ct Inland . Prices comet si I ivk of gciing to press 26. 7 .63. ■ ■'

A new MFI Home Computer Desk
keeps your computer, your home
and your budget all in tune.
See them now at your nearest branch.

Phone TELE DATA 1 200 0200
for address of your nearest MFI

Your friends

in the furniture

business

SINCLAIR USER September 1983

17

Arcade Action For The
ZX Spectrum

Protek
ZX Spectrum

Joystick Interface

£14-95

The Protek Joystick

interface allows games to
be controlled with a
Joystick Works with any

game which uses the
cursor control keys for
movement and for fire.

— Rigid black plastic case.
—Accepis any joystick with

a nine pin connector.
—Can be used with other

spectrum accessories.
— Patch Program for other

popular games available

iv

Spectravision
Quick Shot

Arcade Style Joystick

£12-95

Super fast joystick with
contoured grip and rapjd
fire button on top for easy
thumb action and Optional
left hand fire button.

—rigid plastic construction.
— universal nine pin

connector,
—re moveable suckers for

a firm hold on any

surface.

— AsetecTion of compatible software (ZX Spectrum) —

Area etc

Carnal)
OUL

DK Tronic*

Inuglne

New Generation

Haider □( the Cursed Minn Paton

Black Crystal Prolefc

Froggy, Z-Man ftabfclt

3D Tan*. Meteuroids Slhersofl

Maze ChasE. SpaCvadftrt Stiruhl™

Zzoom Ultimate

Escape. 30 Tuftnai, Knal In nu Romex

Fhghl Simuaarinn. VU 3D

Airlinar, Speclraptsdu. u'onli.-ifi I k>;idf un ner

Escape MCP, QuacMfS, Race Fur, Cemropods

Qrourd Allack. Oybcr RalS

Android

Cuc/kiH;

Cutour Clash

ZX Spectrum Software

JoystrCk compatible

Airliner

(16K-48K)

£595

Fly an Airliner n10
Edinburgh Airpon
yc-u can lake off.
land, navigate and
manoeuvre 1 using
a comprehensive
instrumen! panel,
map display,
runway view arid
instruments

SpectTapede
(48K)£5-95

They're all here in
the mushroom
patch, Sp«ders,
Snails, Scorpions,
Fleas, Worms and,
oi course,
Cenlipeoea The
version with so
much High speed
M.'C arcade ad ion
with three sc.Qfe
levels antf high
scone (able.

ZX 81 Software

Roadrunner

G6K-48K)

£595

Can you handle
I he hat rod? Can
y-ou escape from
I he mOnSlers?

Can you coven He
whoNi mars? This
an action WC
game, has three
skill levels and a
high score, fa !>■

Venture

(16K-48K)

£495

Tins g hi r n b Ih r ft
dream seven

t?:<.i_:ii«ny games to
win you a fori una
or lose all. Test
your superman
qua Mies against
mystery monaJ era
Be ton races crash
anc bonb your
way to riches or
ru<n.

ULEQ
(16K) £5-95

Can yiiu alasl the:
aliens as they
mass on their
landing pads.
n.gh speed M/C
arcade action,
with high *core,
sKill levels Two
player optiC-r and
increasing
difficulty.

Byter
06K)£4-95

T he fastest

mo richer , n the

west Vou've
never played the
game until you've
flayed I his
version. All M,'C
code wilh high
score levets and
increasing
diHicully.

TRADE
ENQUIRIES
WtLCOME

SUb|4K! bo Jvulibilely. Prices cixrfrCI
■i Una of poirig bo pfws

=Pif©tolk :

COMPUTING LTD,

i!e:j Trorlt- Marti
Clydesdale flank Building

High 5tr*cl. South Qucrmferry
Edinburgh EH 30 9HYV
TbI. 031-331 1400

18

SI NCI .AIR USER September 1983

Dolphin camp
confusion

I WRITE with regard to an
article in your June edition in
which you talk of the holi-
days organised by Dolphin
Activities Ltd as being Dol-
phin Camps. You will uotice
that Dolphin Activities Ltd
does not use the term Dol-
phin Camps because that
name is applied to some
camps which we have organ-
ised since 1919.

The Dolphin Camps are
canvas camps organised for
preparatory schoolboys on
the cliiT-top at West Runton,
Norfolk. In addition, for
older children, we organist
specialist camps for go-kart-
ing, canoeing, sailing.

You will appreciate that
the similar names tend to
cause some confusion whith
we are anxious to avoid,

N Taylor,
Walthamstow, El 7.

Cheaper file
solution

I WAS READING Sinclair
User Hardware World —
May edition — when I saw
the article for an improved
printer spool.

I believe that I have a
much cheaper method of
dealing with the problem. A

folded piece of printer paper
is inserted in the slits in the
side of the plastic ends and
then wrapped around.

When the end is pushed
into the roll of paper it fits
much more tightly and seems
to eliminate the problem.

Nicholas Atkinson,
Rye, Suffolk,

Unsolicited
compliment

MAY I comment on the qual-
ity of your magazine? It has
improved monrh by month
and I find it an excellent mix-
ture of reviews, comment,
news items and advertise-
ments. I look forward to re-
ceiving each new edition with
increasing interest.

David Brown,

Consctt,

Do. Durham.

Simple binary
conversion

1 HAVE FOUND that
among my friends who own
SpeClrums and also note from
many of the programs you
publish that many people
have difficulty in transposing
binary numbers as used in
graphics into decimal.

The eight digits can each
be allocated a number, thus:

Binary

DeciitjI atacalian

If any of the eight digits is
expressed as a T in the bina-

ry number, the number be-
low that digit is taken as the
decimal. If more than one
box is expressed as a T, the
sum total is the decimal:

a

1

1

1

a

i

128

61

37

if.

8

4

2

i

B

]

D

128

64

3?

It

t

4

■J

Binary

Decimal allocation
T T T

Take the decimal numbers
below the Ts which in this
example are 64, 16, 8 & 1 and
add them together = 89.

B Dickenson,

St Neots, (lambs.

Light work for
new input pen

IN YOUR REVIEW of the
dK'tronics light pen, to say
that the suggested delay rou-
tine causes an immediate
crash on the 48K Spectrum is
a damaging comment and un-
true.

Although 1 have no con-
nection whatever with the
company — I am just a well-
satisfied customer — I feel
compelled to tell you that 1
have I bund no difficulty with
the delay and to denigrate the
excellent device s however
slightly, through what must
surely have been an error on
the part of your reviewer, is
unfair.

The delay routine sugges-
ted can prove very useful but
it is not obligatory. I have
written a program for family
use which gives two hours'
amusement without having to
use the Spcttrum keyboard,
except to enter the number
wishing to play, and their
names for the scorecards,
after loading.

That worked perfectly
with the delay routine which
your reviewer condemned
but I have now abandoned it
to speed the action and add
another competitive aspect to
the game options, all of
which, and there are many,
arc selected by pointing the
pen at the appropriate areas
on the screen.

Incidentally, I have not
written this to sell my pro-
gram, My efforts in that di-
rection are strictly for home
consumption and my own
amazement.

[ thought it only fair to say
that the dK'tronics light pen
has added very considerably
to the pleasure I derive from
my Spectrum and I hope that
you will review your review.
Alfred Bone.
I) a gen ham, Essex.

Lower cost of
planned cycle

THANK YOU for your re-
view in the July issue. I wrqre
to you to inform you that wt
had reduced the price of Cycle
Planner/Growth Tracker from
£7,25 to £4.95, Unfortu-
nately that was not conveyed
in the review which had as
one of its criticisms the cost
of the cassette.

We had two quarter-page
advertisements in Sinclair
User May /June — and have
refunded £2.30 to all mail-
order customers after Mav
25.

Medidata,
London NW9.

more letters p.2Q

SINCLAIR USER Supiembcr 1983

19

Letters

Plea for more
machine code

HAVING RECENTLY
bought a Spectrum, I have re-
started the quest for machine
code programming, having
already broken through on
the ZX-81. I can say now that
I am fairly proficient at il but
I wish to make a complaint.

You have not yet in any
Sinclair User issue made more
than a passing reference to
Spectrum MC and little more
in the case of the s 8i. Ma-
chine code programming is
not really so difficult if you
try and it is most satisfying, I
am sure it would become
much more commonplace if
you printed articles on MC
programming techniques and
advice s and fewer articles in
the vein of User of the Month
and fewer large, spacious il-
lustrations and pictures.

Further* what about giving
Andrew Hewson more pages?
He is often helpful and is to
be encouraged.

Finally, 1 'am glad to see
that you often review current
software, as an unbiased
opinion is often a good guide-
line on a certain tape. In the
one tape I have bought which
you had reviewed, however, I
was misled by you. The
game, Winged Avenger by
Work Force was, you said,
difficult. That is rubbish.
When my sister, aged 1 1 , and
I play it, the only limiting
factor to a high score is how
many hours we have to spare
to play. It is undoubtedly the
worst Spectrum game 1 have
seen, so please review games
critically.

J H Fletcher,

Wirral,

Mersey side.

• We are looking at a series on
machine code programming on
ike Spectrum but will not be
printing it at the expense of
more general ankles, such as
User of the Month. Our read-
ers have a wide range of inter-
ests and use shall attempt, id
continue to cater for all of
them.

While one person's criticism
is another's flat iery } m always
try to give readers a good idea
of what to expect from the
software on the market and
%aill not be afraid to make
critical remarks where they ap-
pear justified.

Disc limits
warning

I BOUGHT a copy of Fete
Shelley's cassette XL 1. 1 had
problems loading the cassette
into my Spectrum, so re-
turned the cassette to the re-
cord shop, which exchanged
it for another copy. That
copy would not load.

I telephoned the record
company, which told me that
the cassette is only for the
48K Spectrum. Nowhere on
the cassette or the packaging
did it say so. I would like to
warn other I6K Spectrum
owners to prevent them
buying the cassette hoping to
load it into 16K Spectrums.
Bryan Griffiths,
Luton, Beds.

Keeping faith
with Sinclair

I HAVE been reading Sin-
clair User for about five
months and find it very good
value, but I have had difficul-
ty with Sinclair computers in
the past,

I had two 8 Is which were
faulty and then I got fed up
with the two 81s and brought
a THS-80- It had no colour
graphics so I bought a Spec-
trum, which I have had for a
month and find il a very big
improvement on the ZX-81.
Keep up the good work.

R Conies,

S i 1 1 in gbou rue ,

Kent.

Randomized
screech

WHILE I was experimenting
with the command RANDO-
MIZER USR on my 16K
Spectrum I discovered that
by typing-in RAND USR
1331 a magenta and blue-
striped border was produced
and a screeching sound was
emitted from the computer
That can be stopped by press-
ing SPACE.

That strange bug, if it can
be called that, can easily be
accommodated in games, as it

apparently has no effect on a
program.

Does anyone know why it
does it or how it does it? Also
does anyone know a method
of getting rid of the aggravat-
ing Spectrum bux*?

1 would like to conclude by
pointing-out a bug in Andrew
Hewson's decimal loader on
page 102 of the June Sinclair
User. Surely line GO should
read GOTO 20 or the num-
bers are poked into the same
address each time?

Aidan Taylor,
Lnddon, Norfolk.

Portable
computers

IF ANY READERS are look-
ing for a cheap, strong carry-
ing case for a small computer,
could T recommend the Gear
Bos from British Home
Stores? It is a strong plastic
lunch box 36x28x12cm.
and holds my Spectrum, all
leads, a small tape recorder
and a lew tapes and books I
have lined it with thin foam.
It does the job well and costs
only £4.50,

Many thanks for an excel-
lent magazine. My only com-
plaint is what happened to
the regular education slot?

Elizabeth Atherton,
Chester.

Extra resistor
causes problems

LIKE ALL apparently sim-
ple solutions to the problem
of ZX-81 over-heating, W D
Langton's ideas of a 5ohm
resistor in the power supply
lead is likely to lead to ad-
ditional problems which
could be even worse than
over-heating.

My ZX-81 wirh lfiK mem-
ory draws ; on average, 700m a
and when the printer is work-
ing at full stretch it rises to
1,100 ma. Now 700ma will
cause a voltage drop of 3.5V,
and l,100ma a drop of 5.5V
across the 5ohm resistor.
That means that the original
I0.5V - 10.75V on my Sin-

clair power pack — will drop
to either 7.25V., or 5.25V if
the printer is 'flat out'.

In add it ion j the value of
the smoothing capacitors on
the Sinclair power supply
means that a ripple voltage of
2.2V at 700ma, and 3.4V at
l,100nia, is present. When
the ripple voltage is subtract-
ed from the voltage with the
5ohm resistor in circuit, it
does not take much imagina-
tion to realise what can hap-
pen., as the ICs in the ZX-81
require a 5V supply. Hence
the reason for the 5V regula-
tor in the ZX-81

There is a minimum volt-

20

SINCLAIR USER September 1983

Letters

age drop across the regulator
which will not work properly
unless the voltage to the regu-
lator is at least 7V.

Practical consequences can
be white-outs , crashes, print-
er malfunction — just name
it, you have it,

The only really satisfactory
solution is a regulated power
supply of about 7.5V, which
will cure all problems.

If a simple compromise
'cure' is sought, it is well
worthwhile inserting four
silicon recti Her diodes of 2-
amp rating into the supply
lead instead of the suggested
resistor; doing so will give a
voltage drop of about 2V irre-
spective of the current drawn
by the ZX-81, which is not
the case should a resistor be
used.

Another improvement

would be to increase the val-
ue of the smoothing capaci-
tors by 2000 MFD, The
ripple voltage on the supply
line would then, at worst, be
2V instead of 3.4V,

Although not perfect, the
result would be that the ZX-
81 ran much cooler and any
other problems would not be
precipitated) or made any
worse than before the modifi-
cations.

Charles ttowbothuiti,
Carnforth, Lanes.

Is this a new
record?

1 HAVE just saved Bill the
Worm from the ninth level in
Mind Out for the 48K Spec-
trum. Aly score was 7,400; is
that a record?

I have also scored 82,812
on the Silver Soft Cyber Rats
and 1 53,3^0 on Artie 1 Ga-
las ians. Why not print a
league table of high scores
every month?

Graham Lawrence,

Maidenhead,

Berkshire.

Expanding
factorials

THERE ARE various pro-
grams for calculating permu-
tations and combinations.

They always have limitations

because they necessitate,
somehow or other, calculat-
ing the factorials of various
numbers; the factorial of a
number, of course, being
L x 2 x 3 x 4 . , , up to and in-
cluding the number. Calcu-
lated that way, the. biggest
factorial which can be com-
puted on a Spectrum is 34,

With a little improvisation,
the range can be extended
considerably, by using the
logarithm key:

5 REM LARGE FACTOR-
IALS

10 PRINT 'FACTORIAL
NEED ED?"; IN PUT X:

PRINT X
20 LET A = LN I
30 FOR B = 1 TO X
40 LETOLN B
50 LET A = A + C
50 NEXT B
70 LET D = A/LN 10
SO LET E = DINT D
90 PRINT "FACTORIAL
OF X;X;" IS "; 10TE:
"TIMES TEN TO THE
POWER"; INT D

I have not discovered the
limits of the program. I have
established that the factorial
of 2,000 is 3.3163794 times
10 to the power 5735. It must
be said that my Spectrum is a
little costive in yielding re-
sults at this level and patience
is called for.

Rev H S Corran,

Shankhill,

Co Dublin.

Large demand
at low price

IN THE JULY ISSUE, Ear-
ly end for the ZX-81? you

write that in your opinion
there is probably a base price
for computers of about £30
and also that a fall in prices
would mean the early end of
sales of the ZX-8L

In my school , and I am
sure the same could be said
for most schools , the only
opportunity many children
have for devising their pro-
grams is when they have the
chance of time with one of
the school machines. They
would dearly love to have
their own machines but their
parents cannot alTord the £40
for even a ZX-81,

If the basic price of a ZX-
81 fell to £30 or even lower,
many parents would not only
be able but also keener to
buy. If a child did not sustain
interest, the amount spent
would not be too great; if

interest was sustained it
would be money w T ell spent.
Further opportunities —
birthdays and Christinas —
would provide extras or even
a trade-in for something bet-
ter.

D Gilbert,

"William Bellamy

Junior School,

Barking, Essex.

Club call in
Tameside

I WOULD like to start a

Sinclair computer club in the

Tameside, Lanes area but

first need ro find if sufficienl

people would be interested,

Jacqueline Wright,

17 Crawford Terrace,

Ashton-under-Lyne,

Lancashire.

Making notes
while listing

THERE ARE two small im-
provements I think you could
make to Sinclair User — the
addition of small notes under
the program listings illustrat-
ing how programs can be
converted from the Spectrum
to the ZX-8J or vice versa;
and how about reviewing the
software produced by smaller
firms such as the ones which
advertise in the Super mart.

Apart from that, does any-
body know of a Bask state-
ment which will read what is
typed-in and give X that val-

ue, replacing the lengthy "IF
INK.EYS = "2" THEN LET
X = 2" statements?

Albtair Hodgett (13),
Cheshire.

• Thank you Jot your tips,
which zve are considering. In
our reviews we make no dis-
tinction between large and
small companies. Because most
companies advertising in Su-
permart tend to be small, new
producers, there is not always
time to review their products m
the lime they advertise.

SINCLAIR USER. September /SSJ

21

THE WIZARD'S WARRIORS: A fast, moving
game that matches developments in your
tiki 1 1 as a player by beCOlniiijjf increasingly
more devious. Ry offering to you the full
range of options you can c. hoo*e how to control
your warrior through* tho maze. A full
implementation of this program enables such
features as a continuo-ua series of. sound
effects, arcade quality graphitB, double-point
scoring, and-for the very artful -bonus lives
FORTH. A full implementation. Ideal for
writing fast moving arcado type games.
Ailowa the full colour and sound facilities of
the Spectrum to be ueed. Future Microdrive
enhancements will be made available.

ADVENTURE ONE: Features a save game
routine as the game can take months to
complete.

*A remarkably good version . . . well
worth the money, ...Sinclair {Jtser...

MAZEMAN: A fast action m/egame that

reproduces the spirit of the original

'..is very accurate and fast.' ../Which Micro?.. .

CHESS L4: Ten levels of play with this iil'c

program,

Good graphic screen display.

'In o class of it's own.' ...Your Computer...

INVADERS: Very fast m/c action. Includes
mystery ship and increasingly difficult screens.

Spectrum
E4.9S

Spectrum
£14.95

ZX81 £5.95

Spectrum

£4.95

ZX81£4,45

ZX81 £5.95

ZXSi£4.45

7 MAES AFALLEN, BOW ST„ DYFED,
SY24 5BA

24hr Ansaphone 0970 828651

EM

HIRE

ZX81/SPECTRUM
PROGRAM TAPES

Make the most Of your computer by hiring from the original
and still the only software library ottering all those features:

■ Over 900 tapes stocked, uttering
more than 120 different programs
from 39 suppliers (all with their
permission}— many oftrte best
currently advertised , plus some
specially commissioned— and the
range increases each week!

■ Arcade, adventure arid simulation
games, many business and home

u t.i I i ties, graphics. education ..and sc~
much more besides

■ Descriptive catalogue helps you
make your choice

■ Fro* quarterly, illustrated maga-
zine includes tips from a professional
programmer, CIV plans, reviews.

letters, discount offers— and our
Top 40 Tapei e hart averaged from
thousands ot memters' scores

■ Full-time staff otter you a

friendly, efficient we Icome & service

■ A fortnight's hire lor just tl
+40p p/p— hire wtttt/wtlM you like

■ All tapes guai an teed loadable

■ NEW! Branches now in I ml and
and Belgium, Holland— a quicker,
easier service lor Dverieu member* I

■ YOU rrtay switch from ZX81 to
Spectrum at any time

■ Send SAE tor delai li — or jotfl Oh
money- back no-risk approval today

~r: The SINCLAIR OWNERS'

a L i SOFTWARE LIBRARY

■„» ■ A J Warren Road, Liss, Hants GU33 7DD

Fleasti send ire uii money-back approval my magazine, descriptive library
calalague and Order form, an Hie understanding Iti at if I'm not deliflhlM with
your' service wil fan 28 days you will refund my money in lull.

NAME

ADDRESS.

Please enclose cheque./F.O. for £6.50 (year's ZXB1 membership)'

£9. 50 ( Sped ryrfi ) . O VBrsaas E2 «* tr a. , n aacti cmv?

su

22

SINCLAIR USER September t9S3

J

The

Golden

Apple

48K Spectrum

You must set out on a quest to find the
Golden Apple'. On your journey you
will pass through mansions, travel
overseas and onto an island, hunting
your treasure.

ZX81 Adventures £5.95

At I these games are instant- response machine
code programs. Adventures B, C and include
cassette save routines.

fc Computing Ltd.

.in Street. Brandesburton,
riffietdY025 8RG,
0% Discount for 2 and 1 5% for 3
or more.

Cheques and P.O.'s made
payable to Artie Computing Ltd.
Jeaier enquiries welcome.
P I ease State whet he r your ofder is
forZXSl or SPECTRUM
Access and Bardaycard
welcome.

SendS.AE.43in x 6 in) for FREE
catalogue of our wide range
of programs

II' H CHI A ■

kdillh
■>i r h-l

16/48K2X/Spectrum
16KZX8T

You find yourself
si r anded on a strange
alien planet. Your aim
is to escape by finding
your captured space
craft. But beware of th &
little green man who
may get to you!

ANOTHER CiRFAT
AnVtMTUFE

.MMEFOfl
j. ■! i: i:

48 K Spectrum

16KZX81

Yo u a re in the midd I e of
a South American
jungle when you
stumble across a
strange Inca temple
Enter it to collect
treasure and then try to
return. But beware
don't let greed be your
downfall.

ig to A ttTC COMPUTING
arid cur i;Ji LiortEi el ssis. Cooias of which

4SK Spectrum

16KZX81

While on a
reconnaisance
mission you are drawn
to an alien cruiser on a
humanoid slave
mission. Try to escape
from aggressive
aliens, luscious
androids and drunken
barmen. Your only help
is Fred the friendly
android.

48K Spectrum

16KZX81

You have to survive an
engine failure while
flying over en apparently
uninhabitated isJand in
the South Atlantic. Use
your wits to harass the
enemy, but treat the
beautiful native women
with respect, to escape
from the island and
return to an allies
arrcraft carrier.

ARTIC COMPUTING LTD

Main Streel BrvindnshiJrtnn
Driffield Y025 8RG

■HE

Please rush me'

■Adventure A Q bD cQ dD eD

-tormyZXBI 05 .95 /SPECTRUM E6 95

I enclose a cheque lor £ .

or debit my Baft lay-card/ Access accounl

ADDRESS

"Tick, delete or complete as applicable

■

■

"ADVENTURES IN

Tra nsy Ivan fori Tower

Aspine chilling adventure . . .
enter via the dungeons . . .
navigate your way through
500 3-D rooms , . survive
the swooping vampire bats
. . . reach the terrifying top . .
confront and kill Count
Kreepie, ridding the world
of this Transylvanian Terror-
Can you survive the Top of
the Tower ? Full save routine
for use during the hours of
darkness! 48 K Spectrum

E6.50

IB

Super Spy

Locate the secret island
hjdeaway of the mysterious
meglomaniac Dr. Death.
Follow his trail across
continents, through
complex puzzles and 3-D
mazes. Discover the
entrance to his under-
ground lair -- but beware
even with your death-
defying gadgets his evil
henchmen may still win the

dayJ

With save routine for part
time secret agents' 48K
Spectrum £6,50

AVAILABLE FROM W.H. SMI

AND ALL LEADING

TMNSYLVANIAN

•fml

RICHARD SHEPHERD
SOFTWARE

Of

Can you discover the fabled treas
by lethal crabs and menacing eie
secrets of the Lost City as you wai
ancient columns. Explore the hur
the treacherous seabed, each wil
dangers

Sensational 3-D graphics used as
before! 48 K Spectrum £6.50. Full

RICHARD SHEPI-

SOFTWARE

DEALERS - GENEROUS DISCOUNTS AVAILABLE CO

RICHARD-SHEPHERD

o jT\ /p'Tf \A/ A R F

ELM HOUSE, 22-2S ELMSHOTT LANE, OPPENHAM. SLOUGH, BERKSHIRE.

CREDIT

RING (0
FOR EXPR

Hi «■

*n programs t tre sold subject to the concritron that tney may not, oy way el trad? or otherwise, tx tent, t\

\m

GIN ATI

IITH, JOHN MENZIES, BOOTS*

G COMPUTER STORES

ERE
SCENT i

y

RICHARD SHEPHERD
SOFTWARE

iCT JOHN SALTHOUSE ON (06286) 63531 FOR DETAILS

IfiviiK il»k- J*.lr-nf'
by Peter Cooke

Exhaust your ingenuity in
the quest to find The Seven
Parchments of Xaro and
their meaning I Will they
lead you to undreamt of
treasures or eternal doom?
Explore the mysteries of the
stockade and puzzle within
the Pagoda! A spectacular
split screen graphic and text
adventure to braintease you
for weeks J

Adventurous graphics for
every location. Save routine.
4SK Spectrum E6.50.

Everest Ascent

Stake your claim to the top
of the world in this strategic
vertical adventure. Conquer
the summit of the world's
highest peak! . . . struggle
from base camp to base
camp . . . survive the
elements . . watch out for
avalanches, thin ice and
wayward sherpas . .
encounter abominable
snowmen and cross
bottomless crevasses!

A game of skill, strategy and
planning — a graphic
simulation of man's ultimate
endeavour! Save routine.
4SK Spectrum £6.50.

D HOTLINE

S SERVICE

RICHARL>SMEPHERD

SOFTWARE

EUW HOUSE, 23-25 ELMSHOTT LANE, OPPEN HAM, SLOUGH, BERKSHIRE

out resold or otherwise circulated without the written permission of Richard Shepherd Software Ltd.

Selected titles availably hi larger brancnei

4&ms*

*>*.

rfV*

^^

f 1

is

1^

3

>*>

ft* 0^

1**

Hardware World

Stylish
keyboard

STEATITE Insulations has

produced one of the mas*
stylish keyboards yet for the
ZX-81. It has a sloped front
and 40 push-hutton keys.
The keys are labelled just like
the ZX-81 with keywords
printed on the case. The ZX-
8 J will not at present fit in-
side the keyboard; its steel
base provides no room to fit it
but Steatite plans to change
that. The ZX-81 connections
are made by soldering two
cable strips under the key-
board sockets after pushing
them through the hole above
the ZX-81 keyboard.

The instructions are clear
and simple and the keys a
pleasure to use. The only
problem seems to be dished
tops of the keys which are a
tittle difficult to insert, Stea-
tite says that it wants to im-
prove the keyboard as much
as possible.

Contact Steatite Insula-
tions Ltdj Hagley House.,
Haglev Roadj Birmingham
B16 8QW. Tel: 02 1-454
8661 for the keyboard, which
costs £30.?5 inc VAT and
postage.

RAMpack

grip

IN THE JULY issue a re-
view of ZX-81 RAM packs
omitted the name and address
of Audio Computers. It has
now sent a newer version of
its RAM pack which' it has
been selling for the last three
months. It is much better
than the one tested pre-
viously as the edge connector
is different— it is now black
with a tinned spring instead
of gold-plated— and has long-
er feet to take it up to the
correct height. The RAM
pack grips with a ridge of
plastic on top of the ZX-8 1 .
Audio Computers is at 87
Bournemouth Park Road,
Southen d-on-Sea, Essex, Tel:
0702 6 1308 L The price of
thelfiK RAM pack is £19,95
plus £1 postage and packing.

Universal joystick
produced by AGF

AGF has produced a pro-
grammable version of its joy-
stick board which works on
either the ZX-81 or the Spec-
trum. There are two joystick
sockets for standard Atari-
type joysticks but they both
operate the same keys. There
is no longer a need for a
specially-modified joystick,
The programming is done for
each of the five positions of
< , > , :, /, and FIRE button
1 by two crocodile clips for
each of the positions.

One clip selects one of five
*D' bars and the other one of
the 'A 1 bars. Thus any of the
keys on the 40-key keyboard
can be simulated by various
combinations of the two
clips.

A chart is given on the
back of the joystick giving rhc
*D' and *A' numbers for the
various keys.

It would have been far easi-
er to use if it had been set out
like the keyboard in a 10 by
4 line maim instead of an 8
by 5 matrix. It would also
have been useful to see that
or a picture of the keyboard
showing the relative *A n and
"D 1 lines in the instructions,

Ten programming cards
allow the user to mark the
position of the clips lor var-

ious games, so reference to
the instructions is not re-
quired every time. Extra
packs of 10 can be purchased
for£l.

The board has an exten-
sion piece on the back for any
other add-ons and is easy to
use,

One difficulty might occur
for people who have fitted a
ZX-81 Or Spectrum into a
case; the crocodile clips may
not lit between the case and
the board which is tight
against the back of the com-

puter. The board should be
very popular with games
users as it means that any
software can be converted to
use joysticks without special
tapes or joystick-adapted pro-
grams. It cannot be out-dated
as all games have to be de-
signed to use the keyhoard.

The joystick board costs
£33,95 and includes a demon-
stration tape, joysticks cost
£7.54 from AGF Hardware*
Freepost, Bognor Regis,
West Susses P022 9BR.

Sturdy stand limits growth

COMPUTERLOCK pro-
duces a large black tray and
stand for the ZX-81 or Spec-
trum which tidies all the wir-
ing for a computer . You can
Stand a TV set on top of the
stand, which is about 9in.
high, to provide a better
view. The tray is large —
25xl7-£in. with a lin, wide
ridge all the way round. The
TV stand should support the
weight of most TVs and the
model tested had the two ex-
tra mains switches fitted.
They are optional extras at £3

each but you will have to wire
them to the mains yourself. If
you are unsure you can ask an
electrician to wire it from the
diagram provided.

A hole in the front of the
stand permits access 10 the
keyboard but the remainder
of the wiring is hidden.

The cassette leads can be
taken out of the side of the
stand at the left but they will
be near the mains leads, as
that is the only exit. It will
not be possible to use the
Sinclair printer as it will be

under the stand, as well as
any Microdnves,

Altogether a sturdy pack-
age bur it would be difficult
to use if you intend to add
anything on the back of the
computer which requires ac-
cess during programming.
The Computeriock console
costs £31.50 and is suitable
for the ZX-81 or the Spec-
trum. Computer lock, 2
Wychperry Road, Hay woods
Heath, West Sussex RH16
1HJ. Tel: 0444 451986.

M.'TC IlajJn.'ii.Ti K.T.'.l'

SINCLAIR USER September 1983

27

EPROM boosts
Basic facilities

ORME ELECTRONICS
Kprom Read card for the 1 6K

and 48 K Spectrum fits into
the ROM space which is un-
used at present and can pro-
vide more facilities for Basic
programs. With the EPROM
I fitted, 10 extra routines are
added for program editing,
such as block delete of any
section of program, re-num-
ber ing, variables dump.
Commands which can be
used in programs include left
and right scrolls of the
screen, TEXT justifier — to
the printer only— and a very
good sprite routine which
will allow you to print var-
ious-sized characters at any
location on the screen.

it will also allow you to
turn round the characters by
90 degrees and print them in
inverse and/or over other
characters. There is also an
extra graphics set which can

be called-up from the ROM
into the user- definable graph-
ics area.

Each of the routines is
used bv giving a RANDO-
MISE USR- variable-com-
mand. An OUT command
must also be used to change
10 a different section of rou-
tines as only IK of the ROM
is available at a time. The
first routine is called by a
number every time the pro-
gram is RUN and that sets up
the variable names to be used
in the rest of the program.
So, for instance, RANDO-
MISE USR REN would re-
number all the lines in
increments of 10 from 10.

The routines are easy to
use if the examples are fol-
lowed to the letter. VR In-
variable dump— works only
on variables created after the
variable set-up routine and
deletion of lines works only

with lower-case REM del

statements.

Prices update

The EPROM board for
use with motherboards costs
£18.50 and the direct con-
necting type £21.25. Tape
control costs £3,45 extra, as
does EPROM I at £9.95.
Postage and packing costs 75
pence for the ILK. and £1,75
overseas. Orine ElecLronics, 2
Barripper Road, Camborne,
Cornwall TR14 7QN. Tel:
0209-715034.

IN THE AUGUST issue in
Hardware World, we gave
the price of the Tactile key-
board as £99.95. It should
have been £9.95, with the
price of the demonstration
tape as £5.95 and not £92.95.

We also said that the Jiles
tape copter cost £99.95. It
should be £9.95.

Database
interface
opens
new world
to users

COBRA has been advertising
its RS232 interface for the
ZX-81 for some time. Its
TMS terminal package con-
sists of a tape and a black box
which fits on to the rear of
the ZX-81. Out of the black
box emerges a single grey
lead containing three wires,
one OV, one red output wire
and one blue input wire. The
wires need to be connected to
a modem and a 300 baud
acoustic modem was used to
try the TMS pack with Tele-
com Gold.

Once the interface and a
16K or bigger RAM pack is
plugged into the back of the
ZX-81 the power can be
turned on and the TMS tape
LOADed, Telecom Gold ser-
vice was dialled to gain access
to a private database run by
Cobra.

The TA1S program must
first be set up for the correct
speed, number of hits sent by
the use of a very good menu
which allows you to select
only one character option for
each instruction. Cursor con-
trols are provided to move
from one instruction to the
next.

If a selection is incorrect
the program will not leave
the menu when pressing
NEWLINE and will place an
asterisk over the mistake.

Among the options of the
program are the ability to
send control characters— for
special options— upper- and
lower-case, even though the
ZX-81 will display only up-
per-case — and obtain a hard
copy of the result on the Sin-
clair printer.

Once on the Cobra data-
base you have a choice of
playing games, sending mes-
sages to another user via the

oamimaJ mj next page

28

SINCLAIR USER September 1983

Hardware World =

amsbtmd from previous page

Mail Box facility or talk-
ing directly to another user as
well as using Telecom Gold
facilities. All the facilities and
access have to be paid for.
Cobra hopes to set upj with
British Telecom, a network
of home users to take advan-
tage of the system.

Having an RS232 docs not
restrict you to using Telecom
Gold; it can be used on most
databases or bulletin boards—
like electronic newspapers
run by user groups -

The system works well
within the limits of the ZX-
81 but a few limitations were
noticed— not due to the inter-
face. One was the ZX-81 key-
board which made reliable
communication difficult and
the other was the telephone
line. The system used de-
pends on the distant com-
puter sending back your
message for you to see-
called full duplex— and the
message can be garbled both
ways, leaving you unsure
whether it was due to your
mistake or that of (he system.
That was due mainly to line
noise.

The TNS package costs
£71 from Cobra Technology
Ltd, 37 & Caledonian Road,
London Nl IDY.

Another solution to
RAM pack wobble

KELWOOD COMPUTER

cases has two computer
stands— the Wobble Stopper
for the ZX-81 and the Power
Base which has versions for
both the ZX-81 and Spec-
trum.

The Wobble Stopper is in
three versions— small , tilted
and large, for use with the
Sinclair printers. Tilted ver-
sions are available in small
and large sizes. All versions
have a white nvlon screw at

J

the back which is tightened to
prevent the wobble, clamping

the RAM pack firmly to the
ZX-81.

The Power Base is a slop
ing stand of" about 15 degrees
which has two rocker switch-
es mounted on the sides. The
right-hand side switch con-
trols the power to the com-
puter and can be used as a
RESET switch. The power
plug from the power pack is
plugged into the back of the
stand and the computer ob-
tains its power from a lead
which is terminated inside
the stand. The other switch

controls the two MIC and
EAR leads.

The cassette leads are in-
tercepted and plugged into
the stand from the computer;
two 12in, long cassette leads
are then plugged into the tape
recorder from the stand. The
front of the Power Base has a
turned -up edge to hold the
computer firmly, The only
screws are for getting into the
base and to hold the rocker
switches and power socket to
the Case. They are also sup-
plied with rubber feet.

Power Base and Wobble
Stopper art available from
Kelwood Computer Cases,
Kelwood Heating Ltd,
Downs Row, Moorgate,
Rotherham S60 2HD. Tel:
0709 63242. The cost of the
ZX-81 stand is £5.25 for the
small and £5.75 for the large;
tilted types cost £] extra.
Power Bases cost £13.50 for
the Spectrum and £13 for the
ZX-81. inc. VAT and post-
age.

Permanent storage

EPROM SERVICES has a
range or EPROMs available
for the ZX-81. EPROM I

contains 10 small routines for
program editing such as
block line delete, delete up/
down from line X, re-number-
ing— only the line number,
no GOTOs or GOSUBs-
and various checks on mem-
ory such as program length.
The next 12 routines are
for entering machine code
into REM statements, in
HEX only, and extending
and modifying both the ma-
chine code and the REM
statement. There is also a
very useful hex dump facility
to view an area of memory
which gives eight columns of
hex addresses and the data in
them on the screen.

Sixteen more routines con-
tained in the EPROM I deal
with the screen display and,
together with a 61 16-type 2K
RAM chip at addresses 14K-
I6K on the same board, allov*
you to store machine code or
TV screens in the RAM.
That data is thus protected
from a Basic program and can
be recalled at any time. That
makes a total of 38 routines in
one ROM, a real achieve-
ment,

EPROM II concerns tape
routines for a rapid SAVE
and LOAD. EPROM IV con
tain a very good ZX-81 moni-
tor program. It requires that
the board be fitted with the
same 2K. RAM as with
EPROM I to store the moni-
tor screen and separate ma-

chine code stack. All the
system vat tables are saved on
entering the monitor and all
the various Z-80A registers
can be set before entering a
machine code routine.

Two more useful instruc-
tions include ZX-8 1 versions
of the IN and OUT instruc-
tions on the Spectrum for
transferring data to I/O ports.
Machine code can be SAVEd
and LOADed from the moni-
tor under the name 'M\ The
monitor will work on me
minimum IK RAM ZX-81
and does not require a 16K
RAM pack

Breakpoints and the dump-
ing of the 2-80 A internal reg-
isters is done into the 2K
RAM so that a system crash
does not result in the loss of

code; a re-set key must be
used and the power plug left
in.

The EPROM board plus
EPROM 1 is sold for £20
including VAT and postage.
Additional EPROMs II to IV
cost £10 each and the 6116
RAM costs £6. Eprom Ser-
vices is at 3 Wedgewood
Drive, Leeds LS8 1EF. Tel:
0532-667183. It also does
development work and
EPROM copying/program-
ming.

SINCLAIR USER Si<piember 1982

29

ABF

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:::;::: :::■:::;:: a: :::

PROGRAMMABI

INTERFAC

for

or

ABOUT OUR PROGRAMMABLE
INTERFACE

Surpassing the outstanding specification of
our interface Module II which still offers
the best software 9Uf>pOft at its price, a
Joystick Interface that is compatible with
ALL SOFTWARE through its unique hard-
ware programmable design.

The interface plugs on to the rear connector
of your ZX81 or ZX Spectrum,

Quick clip-on connections;, which are con-
figured from a reference card supplied, allow
you to define which of the forty key* are
simulated by which nation of the Joystick.
A pack of ten Quick Reference Programming
Cards makes setting for your favourite panics
even easier. These can be filled in to show at
:i fiance the confiRuration required and
stored in Lite cassette case of the particular
game. When you change to a game using
different keys the module is re-programmed
in a few seconds.

M with our Interface Module 11 the Pro-
grammable Interface accepts alt standard
switch Joysticks that are Atari- compatible.
Two sockets are avail ahle which are con-
nected together for two player games which
use the same keys for both players.

The Interface resides in the keyboard
address space and does not affect its opera-
tion or inierfere with any other add-ons. A
rear extension edge connector will accom-
modate expansion of your system.
The unique ACK key simulation principle
makes it extremely easy to incorporate
Joystick action in your own programs* All
eight directions and fire are read by simple
BASIC

With every order conies a free demonstration
pro gra m called 'Video Graffiti' plus a full
set of instructions.

PACKAGE CONTENTS SUPPLIED

* Program mat le Interface Module as illus-
trated, complete with clip-on program-
ming leads.

* Self adhesive programming chart detailing
how to define which key is simulated by
UP, DOWN, LEFT, RIGHT, and FIFE.
This can he fisted on to the case of your
computer or if preferred the protective
hacking can be left on. The chart is made
of a very durable reverse printed plastic
and is extremely easy to m

* One pack of ten Quick Reference 1'ro-
gramming Cards for sd-a-glance setting
to your games requirements. The card
allows you to mark the configuration in
an easy to read fashion with space to
record the software title and company
name,

* Video Graffiti demonstration program
which is written totally in BASIC to illus-
trate how all eight directions and file
can be read. This is also a useful high
resolution drawing program.

* 1 2 months guarantee and full written
instruction*.

I

ATARI
CONTROLLERS

FOR USE WITH OUK INTERFACE
Module 01 VIC 20, Commodore 64,

Atari VCS, Atari 400, Atari 800

If you require extra Joysticks for our

original interface module mark order

"OLD" Joysticks

ONLY £7.54 tnc VAT + P&P

FROM: MR/MRS/MISS

ADDRESS

TOTAL SOFTWARE
COMPATIBILITY !

SEND C. WO, IN O STAMP NEEDED) 10: A.G. F. HARDWARE. DCPT. SU
FREEPOST, BOGNOR REGIS, WEST SUSSEX PQ22 9 BR

QTY

ONE

IFEM

PROGRAMMABLE INTERFACE

PAC K(S) QU ICK REFERENCE CAR DS

Tnterface MODULE II

JOYSTICK(S)

SOF TWARE AS TICKED ON LIST
SOFTWAHE AS TICKED ON LIST

VIDEO GRAFFITI

ZX81 □
DEALER ENQUIRIES WELCOME

ZX SPECTRUM □

Please tick

ITEM PRICE

33.9$

1 00

20.95
7.54

FREE

TOTAL

FINAL TOTAL

EXPORT PRICES ON APPLICA TION

M

SINCLAIR USER September 1983

HttKHMH Hi

lit «. issra

isi -

:::::!::: ::! Hi

tia:bsi5s! sSisKKHi Haiti iitirijniaii JiStih
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■— * — P**W *+l It* **+ "+*Rl++lt #*< ■ "-* riT IT!

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RE:

IMPORTANT:

This product is not software
programmed and guarantees
eight direction Joystick
response in machine
code and BASIC
programs.

/

i\

?

KEY FEATURES

■ Any five key configuration

programmed onto joystick

■ Accepts all Atari-compatible Joysticks

■ Rear connector for any other add-ons

■ Use will not affect Sinclair guarantee

■ Full instructions & 1 2 month guarantee

JOYSTICK
INTERFACE E

for

Spectrum ° r

KEY FEATURES
+ Proven CtlfSOf kty aim ulsit ton for
maximum tOftWWti support

* Accepts Atari, Com petition Pro, Wico,

Starfighter, Quick Shot, Le Ktick, etc,

* Sectmd Joymck facility

* Eight directions programmed in simple

BAS[C

* Rear Extension connector for all other

add-ons

* H'ree demo program. 'Video Graffiti 1 + full

instructions

INTERFACE I] COMPATIBLE SOFTWARE
ZX SPECTRUM Hewson ,., Nightflile

CKS

.■,TAKI

ranwumt:

>Uf IU Wini IJL'H IhlhfttAl I
kukb LI i* Ml ^KI'diwUrirM.

MM m, AM hmi >rw -WO

II , ,4j ic^iinrrM'j b^iiBftin^ UJ|

HinvimiFrl^iF rinviLf iiHik Hirjti

■•II- -, h.

Al)lH'V

Consultants

Spootyman
Invasion

Harriet

Cosmos

The Android Run imagine

ICL

Abetsoft

AptMJOlypSe
Software ...
Axis
Blahjr Comp.

& \vL ...

CatnpbeU
Systems .,
CDS Micro
Systems
GTech .,
DJL Software
DK 'Tronics

High Noon Miciornaitla

ETX New Gener-

Maze ma ft ation

TheWiiards Software

Warriors Newsufl ..

Products
Galactic Jailbreak Psion
LabyrinUi

Quicksilva

Clioppet Rescue
Gold Digger
Coniusiori

Gtllpmaii

Leapfrng ,
Specman
Froggy
3 3D Tanx £4,95

Meteoroids

* Slate "AGF version"

Specvaders

M;i7.eiii;iie
Srji I rail

(Han. Dock)
Zzcorft

Ghost's Revenge
tstape £4.95

3D Tunnel £5,95
knot in 3D £5.95
Time Bandits
Spei: trill Mazu
Flight Simulation
VU-3D
Meteor Storm
Space Intruders
Gnasher
Spec taped e
Ground A Hack
□ Cyber Rats £5.95
Pony Express
Vec-Man
LATEST ADDITION

Digital Integration ....
Night Gunner & Fighter Pilot

"PLUS 21 2X8! Titles'"

R + R

Software

Silverwjft

Vectis
Software

'A'r dru pl«sed to say Ttial fi.ti.rn Kittw.irr Howl ir>Tim.rmi>'ii Tor l'lr fttiF li'ifi^t II f'dl li*ln
■(Mnvatnd from mmt U1 Th-; f.uni|iiiiiiti I , U il ebon

Fw K>^n pie all new Mlet lirjin Imug'"!*, CDmmcnciriii roth Zranm. aiII be campaliblo and ca^ry tli#
ajn:sialibilit"v Idijli. Sftciwa below, on F .hc>r packaging. Thjs nciw loc^i flchnmn *i(l Kflp ycHi HiKt WfT
Aan Ll-dt if guara-rMced CDmpjtibln ind is nlifi bsing jdoprijil !iy imrty ot Iha HjpfMftiM 4u|jpl* , 1

A[ Bia rune (It [iri'llinj H i^ hupeiJ am pending -*lHai«4 bed) Bug Byic Aill cnjnv AGF cnmpj!in.liti H

A&F

,il inlp'.i

AliF

AEF

AL>F

AGF Hirrlware 2E Van Gogh Plate, RoyriM Hi:yi< 1V«i !,.nki Hn:v HKT

SINCLAIR USER Sty-ronfer 11WI

31

* For any ZX Spectrum #

THIS PROGRAM WILL HELP YOU TO:
Debuy your BASIC programs quickty and easily.
Understand how other BASIC programs work.
Follow complex BASIC programs step by step.
Teach BASIC quickly and easily.

HOW?

Before the SPECTRUM executes each BASIC statement
in your program it will display the fine/statement number
and the statement itself in the input area (it will not
overwrite the main display area). You control the speed
from single step to very fast. You can produce a trace
listing on the ZX printer, stop your program at any point
to print variables or other expressions, and start/stop
tracing from anywhere in your program.

THE PRICE?

Only £6.95

INCLUDING
P& P From:

TEXGATE COMPUTERS LTD.

Dept.S., 14 Brook Lane, Corfe Mullen, Dorset BH21 3RD

r

L OTHLORIE IM M)

THE WARMASTERS

Menage from Salisbury HQ: —

■ Mnrliiuis h?iv(i l;iriflr:l

death, terror arvd destruction

massive three-legged fighting, machines

Rfldw^nd *.\<sw ywticre

1 miles, awa-y

- SAVE LONDON AT ALL COSTS

*CV1 Brit.im rnlv fin YOUf

•mil! YOV i*al*at VW ctwHeraaf

• tan yo- j manoeuvre your tends, ami
lery and infanrry nn rnp. hanrelisld'

■Oflri you deeiroy !»« Mesh-rating
HEDWEED Willi yOui Hammhfot»*««
bfMPfl -Ldisablu^ yuur amy?

• ^W you be atMa m Ur* an erfattiufl
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fin cafktuitt
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ion should Jh playing REDWEED.
NOTE: thii ii- rat an arcjkdn QAmfi

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war pamQ.
•19 L«v*l*Ol nt>V
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:: ■■nyinu inK(ru<::i<in= -r^K.irtnd in niv-l-

•SPECTRUM 4BH

*E5.50 a nmull piitr-s 1c pay la ssvn
Lnndnnl

AN EXCELLENT COMPANION TO JOHNNY R£|j ntw £5, BO hx thru SPECTRUM *BK

AulftlDH |1 vnn Ihfl^ft «| ill Mil if W!^ L,"4imp |y]y hlSHTICa & l\jlu>i*lii BifiOd is til

iniwnsn rt 'nrli is and mimii/i ih> pjLii-fi. Lden cunlKt us flni. W< fc-r ih. tnn pl i|i

WW ffimH *4MCl«IEftl*

FOR afETrtllfl Oh rHE COMPLETE RANGE QT ZX fi1 fin?[) SPtCTPUM TITLES PLEASE
SEE LAST MONTI l'f> MAGA/lrVF Ofl StNU «.*,«.

AVAILAHLI: FH(]M BETTER SOFTWARE SHOPS OH DIRECT Sv MAIL SjMDtH ACCESS NUMBER
CHtC UEK OK »tlS I AL ( MDFHS PI FA5F PAY A B E TO

M. C. LOTHLORIEN

DEPT. SUB, A, GRANBY ROAD. CrIEADLE HULME.
CHESHIRE SKFI f.l S

C0mpl06l I ^ ...put your Spectrum to work -fc f\T j\\T Display

systems i/ijim i MetM

MASTERFILE

"The most comprehensive of The data-beses,

Design features

Sinclair UF"rJun t 19Bj

nnenu dnveu

1ully machine coded

dynamic uariaok length 1 il-e — NO WAST ED SPACE

updfltK. eras*, cupy any record

* you hive uu i& 32K per f Me

it open ended - ^*dy tor mi^i-adrlve
Files

up to 26 JTE MS par record
up to 129 character; per ITEM
it Ave »fid iGdd F I L£ independently af [he program
+ sflarch FILE for numeric or qh»racier eomparnon -
on multiple ev<?i e
Display

♦ up to 36 di Ifer^nt »v<r-d*l incd wtyl Ot viewi njj
9eiec>eddata

A sequence cy ITE W or cnnsnaiogjea! I y
it 1 L^l HtJJ'JflUiS di-spliyEd an a time

■# TOTAL ■■ AVERACE *ny ITEM

it optional USER BASIC for tailored process i">a

Now accepted as the def i n i tive f i I i n g system
for tht! 43K Spectrum

£15,00

MilHU'lfik'-Ki e subset tor the 16« Spectrum CB-95

Semi your order «*itha cfieque or postal order id Cwnpbctl SySiems lL>ep1 Si 1
15 Nous RtMd Buckhurst H.N. Eslbx IG9 6&t r nnJanri Telephone 01 &Q4 0&89

FOR ZX SPECTRUM 16K J8K

a simple, powerful machine coded interpreter for generating
dynamic textual display for use in advertising & education

THE NIT OF THE LAST MICROFAJft

it D LAN commands ^rn a" si nglR frt!*t fir tymbol

it dlfino iry ivifdrr.v on rhi: inrrun anil r*rJll ai Ptien ii VOu iicc

# u i" ■ *■■■>■ text vju line in anv combirdtlon of 1 1 Ionia, speciflily deigned hv

Image SysTemE in a rangE of stytes and sizes, some with proportional spaced

letters.
it scrol I you r text any vrfi ich wav vou choose withkn the iv. ndovi- — or The whole

screen If you wish
it larger font aize 3y.2

' rtoid pietesii^ keeps left hand margin clean

* BfllGHT. CULL. FLASH, STEADY

it QOSUB equivalent

it i&rirtjn liming Mmmjnds

■fr *6K PLAN. giv H you ItK of Spact <n which to place yaurdisnliY

commandi 1 fi K P L A N givei ypy JK •

ifr S page manual

^^ ^V ^^ ^^ ^^^

SPECIAL INTRODUCTORY OFFER

£7.95

THEFASTONE i6-64Kzxai

"One of the best data-management lyitemi ayailatale let the ZXal."

Sinclair User Jul w 1 9B3 £12. 00

Spectrum 16/48K £4.95

0ULP8

ZX3tl6K f4,75

An ^LJSrarru mailed Fjf ctar py rp^pm. Pnc«
include VA T and passage nn'rfMVr £uftipr. 5AF for ftitf lift.

ZX-81 Software Scene =

New polish
on old
favourites

OR WIN SOFTWARE has

released no new software for
about sue months, so its Cas-
sette Five is a long time
overdue. As with all Orwin
software; it is for the ZX-81
and most of the six programs
run in 16K. All except one of
the programs arc popular ar-
cade games such as Byte*
man, a version of Pae-man,
and Blitz, a version of City
Bomber.

Most of the games are in
machine code. The one writ-
ten in Basic is Merchant and
its author is Michael Orwin,
who started Orwin Software
more than a year ago.

Merchant is a strategy
game in which you must visit
ports such as Alexandria,
Venice and Florence. During
your stay in Florence you can
visit your old friend the mon-
eylender who appears in
many of these types of games.
He will give you financial
assistance or you can leave
your money for him to look
after. Both options usually
result in the same thing.

The game includes graph-
ics and, although it is not
very original in concept, will
provide some entertainment
as you try to make your first
million.

The other games are ma-
chine-coded. They need to
be, as they are all arcade fa-
vourites. The games are un-
original in concept but the
quality of the software and
the smooth action displays
created on the screen make
the programs worthwhile for
anyone who has a ZX-81 and
plays games using it.

Most of the games include
well-presented instructions
which make them easier to
play. It is pleasant to see that
Qrwkfs kind of quality is
available again.

Cassette Five can be ob-
tained from Orwin Software,
26 Brownlow Road, London,
NW 10 9QL. It costs £6.

Tired idea fails
to impress

A NEW COMPANY, Orion,
has launched into the ZX
software market with a lunar
lander program for the 16K
ZX-81, Moon Lander.

Lunar lander programs for
the ZX-81 are not something
which we encounter very
often these days. This type of
program idea is well-worn
and anyone producing
another version should be
sent into orbit.

At the start you have a
chance to select a practice
touchdown. More often than
not when playing the game
you will be informed that
there is a new crater on the
lunar surface where you have
just lauded. For that reason a
practice routine is a necessi-

ty. When in flight, the control
panel with all the landing
instruments is shown,
together with an indicator
marking the height at which
you are orbiting round the
moon.

That update of the display
is fast but the program stops
every time it requires an in-
put from the keyboard.

It would have been better
to use an INKEY-rype rou-
tine for it. The game would
have been made faster and
the player would not have to
press NriWLINE for every
entry.

The instructions are print-
ed on the cassette insert.
They lack structure and pro-
vide little useful information

to the budding astronaut,

The language used would be
better understood by a NASA
trainee than someone who
wants to play a game.

Unfortunately there is not
much we can say in favour of
the game. It is unoriginal the
instructions are largely unin-
telligible and the screen dis-
play is confusing. It is,
however, the first Orion
product and should be treat-
ed as such.

Moon Lander can be ob-
tained from Orion, Fipp-
brook Mill, London Road,
Dorking, Surrey, RH4 1JE.

User-unfriendly games guide

SINCLAIR RESEARCH

has launched two new games,
Sabotage and City Patrol,
for the 16K ZX-81. Sabotage
is a game in which you must
rake one of two roles, either
the guard or the saboteur. If
you choose to be the guard
you must protect the random-
ly-placed boKes of ammuni-
tion which litter the
compound.

If you are the guard, you
will have to corner the sabo-
teur before he can plant ex-
plosives in a secr.et place. If
you are not quick enough, the
explosives will detonate and
you will lose some of the
boxes of ammunition.

Your score will decrease
depending on how many
boxes you lose. If you capture
the enemy, the points added

structive you can be. The
program has an original
games concept and the action
is reasonably smooth. The
only problem occurs in the
instructions which are print-
ed on the cassette insert card.
The game is explained in
simple fashion and the move-
ment keys are shown. The
difficulty is that Sinclair Re-
search seems to have taken it
for granted that the user will
know which key moves the
figure which way on the
screen. The W and S keys
move the character up and
down respectively and the H
and J keys move it left and
right,

Sinclair may be correct in
thinking that most users will
know which keys do what but
many users will certainly be

to your score will, of course, beginners who have just be-
be unaffected by the number come accustomed lo the kcy-

of boxes blown-up.

You may want to take the
role of the saboteur. In that
case the game changes and
you must evade the guard,
played by the computer, and

board.

In City Patrol, a city is on
the verge of destruction as
enemy lighters zoom in and
try to raze buildings to the
ground. It is your task to take

plant your explosives. Your on those invaders and destroy
score depends on how de- them. At the very least you

must prevent them destroy-
ing the skyscrapers.

The game produces a 3D
view of the city on the screen.
There are four levels of the
city and you can select which
one you want to enter at the
start of the game. We rate the
game highly because of its
depth of graphics and plot. It
is difficult to produce such a
smooth 3D effect on the ZX-
81,

The instructions are easy
to understand but, as with
Sabotage, they could be more
clearly set out on the cassette
insert. We found it difficult
to keep track of the instruc-
tions because they were
cramped into such a small
space and, in certain parts>
were loo verbose. Each in-
struction insert starts with a
story line and if that was
abbreviated, more room
could be allocated for the
playing instructions.

Sabotage and City Patrol
are available separately from
Sinclair Research, Stanhope
Road, Camberley, Surrev,

GUI 5 3PS.

SINCLAIR USER September 1983

33

Excellence in combat

THE LATEST release from
Auk Computing is for the
48K. Spectrum and can only

be described as excellent in
almost every detail. Combat
Zone is a version of lank
Battle, a game which can be
seen in most amusement ar-
cades. It is a three-dimension-
al game which has become
popular the last few months.
You are the only survivor
of a battle fleet of tanks. Your

tank roams around a land-
scape made up of three-di-
mensional pyramids. You

must confront and destroy
the enemy tanks and space-
ships which attack you.

The display is completely
in 3D and although the game
is difficult to play at first,
strategies can soon be learned
and you can become a crack
shot.

The author has produced a

display format which adheres

strictly to that of the type of
game you find in arcades. Ev-
erything has been finely-
runed to add to the player's
enjoyment. You can even
specify whether you want to
concentrate in total silence.

3D Combat Zone can he
obtained from Artie Com pul-
ing Ltd, 396 James Reckitt
Avenue, Hull, North Hum-
berside, HU8 flJA,

01 a oattie ueet 01 tanss. rour ine autnor nas prouueeu a oersiae, nus ujrt

Banking on the success of a home
accounting system with security

THERE ARE surprisingly store all the details of a bank The systen

THERE ARE surprisingly
few bank account programs
for the Spectrum but those
which are available are exce-
lent pieces of software.

Bank Account System,
for the 48K Spectrum, will

store all the details of a bank
account, whether they be
cash or cheque transactions.
It will keep account of the
payment of standing orders
and also calculate and update
the balance.

Pretzel logic fails

IF A COM I'ANY has pro-
duced a compiler for the

Spectrum or the ZX-S1, the
temptation must exist to pub-
lish some games which have
been produced with the pro-
gram. Softek has fallen into
the trap and produced a range
of arcade games, known col-
lectively as Ultima.

One of the cassettes in the
range, for the lfiK Spectrum,
is Firebirds, It is little more
rhan a thinly-disguised ver-
sion of PhoeniX) or Winged
Avenger) with two mother-
ships which look like pret-
zels floating around the
screen.

The game is supposed to
be set in space hut there is no
evidence of stars and the
screen is black except for the
birds, motherships and other
moving parts.

Unfortunately the author
has not been careful to reduce
the eiTect of colour-clash
which occurs when two
shapes on ditTerent^oloured
squares seemingly interact.

The effect is worst in the
explosion sequences when

yuu can see the outlines of
the character squares in
which the spaceships were
designed originally.

We detected two display
bugs on the screen in the
second and third phases.
Parts of the display disappear
during play and no effort
seems to have been made to
circumvent the difficulty.
That at least would be excus-
able if the effect was not so
apparent.

The game could have been
reasonably good if more at-
tention had been paid To de-
tail. Perhaps it would be a
good idea for Softek to forget
about compiler games and
produce something in pure
machine code. The games
may be easy to produce but
they are nor so much fun to
play.

Firebirds can be obtained
from Softek, 329 Croxted
Road, London SE24, It costs
£5.95.

The system provides full
error-trapping and will not
allow you to rype-in any in-
correct answers, although
there is an omission at the
beginning of the program
which could be mistaken for a
bug.

When you first use the pro-
gram you are asked to type-in
the present date. When you
re-use the system the old date
is displayed and you are
asked for a new present date.
If you enter a date which falls
before the old date the pro-
gram will accept it.

That may serve some his-
torical purpose so far as file-
handling is concerned but it
could also lead to errors on
the system.

The program is well-struc-
tured and the user should
have no difficulty entering
the data required by the com-
puter to do its calculations.

Unlike some other ac-
counting programs which are
also written in Basic, the code
which stores the password is
well hidden in the program
lines, although someone who
knows a little about the Spec-
trum could probably by-pass
it.

Bank Account System is
good value and costs only £3,
It is available from K J
Gouldstone, 4 5 Burleigh
Avenue, Wallington, Surrey,
SM6 7JG.

Program
tracing

SOME microcomputers, in-
cluding the Dragon and the
BBC microcomputer, have a
command call Trace which
will run through a program
displaying it line by line 10
show the flow of that pro-
gram.

The Spectrum has no such
command in its Basic lan-
guage but the omission has
been remedied by the release
of a machine code routine,
also called Trace, for both
versions of the computer.

The routine lists a user
program line by line; when it
reaches a GOTO or GOSUB
it will jump to the line speci-
fied by that instruction.

If Trace finds an error in a
program it will inform the
user and if an endless loop
has been set up in a user
program it will be easier to
detect .

Unlike the Trace com-
mand on some computers 3
the routine will allow the pro-
gram to run while it is execut-
ing the Trace. The run is
performed in the main part uf
the screen area and it is useful
to compare that output to the
program line which is creat-
ing it at the bottom of the
screen.

The routine provides an
effective Trace command and
is a useful debugging tool. It
is easy to use and can be
Operated with no knowledge
of machine code.

Trace can be obtained
from Texgate Computers
Ltd, 14 Brook Lane, Corfe
Mullen, Dorset, BH2I 3RD.
The package costs £6.95.

34

SINCLAIR USER. September 19SJ

Spectrum Software Scene

Gold star
for results
storage

TEACHER DATA, for the

48K Spectrum, is an edu-
cational program not because
it will teach pupils but be-
cause it will help teachers to
grade examination results.

The program will work out
all the statistics required to
measure examination achieve-
ment and will even assign a
grade, between A and E, to
each pupil. Records of test
passes and failures can be sort-
ed separately on tape. The
teacher could create separate
files for each form in a school
or college.

If a teacher requires a quick
read-out of information, the
program will create a histo-
gram showing the results of
pupils;; means and standard de-
viation can also be calculated
for further research.

The program, written by a
teacher, is aimed at teachers in
state schools and colleges.

It will store up to 400
names in one session, so sever-
al big classes can be dealt with
at once or even for a whole
year.

The calculation part of the
program is menu-driven. The
menu is cursor-controlled, so
you have to move the cursor to
the option on the list and press
V for 'select'. The computer
will give you a chance to re-
select when you press V in
case you make a mistake.

Unfortunately the cursor
symbol moves down the list on
its own when not under user
control, so you have only a
limited amount of time to
press the V key. That is
shown as a plus in the package
but we regard it as a minus.

Teacher Data receives A-
plus so far as we are con-
cerned. It can be obtained
from Brian Farris, 8 Thomp-
son Road, Boltorij BL1 6DF
and costs £5.20. A version for
the 16K Spectrum j with
scaled-down features, costs
£3.80.

Pac-man gets on right
track for a novel game

TRAX is a Pac-man- type

game for the 48 K Spectrum.
The maze is a railway track
and the Pac-man is a train.
The ghost is played by a
white killer train which will
do its best to destroy you in a

collision. The other obstacle
is a tunnel which you must
enter at the correct end,
which is left, or your train
will be derailed.

You may be wondering
where the power pills have

\\U $

**m&. //'■•'/' '04,

$m, t

gone — you cannot have a
game of Pac-man wilhouE
power pills. They are repre-
sented by passengers who are
waiting beside the track for
the train to pick them up.
You score points for each pas-
senger who gets on board.

The game contains ma-
chine code but, surprisingly,
that does not increase the
speed of the trains and docs
not provide a smooth run of
action during play.

The sound effects are im-
pressive. When your train
moves along the track it
makes a chugging noise and
when you are caught by the
killer train the explosion and
fire is effective.

Trax is an original and
entertaining game. It should
be popular with children of
all ages j especially those who
never owned a train set.

The package costs £5.50 3
which is expensive, and it can
be obtained from Soft Joe's
Software, Business Centre,
Claughton Road, Birken-
head, Merseyside L4i 6ES.

Dietron lacks weight in the
slimming business

IF YOU WANT to know
about your weight and the
contents of the food you have
been consuming, it might be
easier to read a book on slim-
ming or dieting than to use
Dietron, for the 48K Spec-
trum,

The program provides all
the information which you
are likely to want about diet-
ing but so does a book. The
other problem with the pack-
age is the number of bugs and
omissions in the system.

Our reviewer entered his
weight and height and was
greeted with an E Out of
Data error at line 56. We

were able to correct that by
skipping to line 60 but the
error is a bad oversight and,
so near to the start of the
program) raises doubts of ac-
curacy of the program data.

The application has not
been very well computerised,
as height and weight data
have to be entered in either
inches and pounds or centi-
metres and kilos. That means
extra calculations for the user
who probably calculates
weight in stones and height
in feet.

The program also includes
a database with information
on dieting hints and a full

nutritional guide. It also pro-
vides a weight calculation
which will tell you how many
months and weeks it will isiki:
for you to reduce to a certain
weight. No effort has been
made to check for unusual
entries and we were informed
that it would take 831 months
and seven weeks to reach a
weight of pounds. We cal-
culate that it would take
slightly longer.

The Dietron package is in-
genious but we cannot say it
is particularly useful. It costs
£4.50 and can be obtained
from computer hranches of
W H Smith.

SINCLAIR USER September f983

35

you li (

— _-4

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ironies

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Spectrin

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Spectrum

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tiPrint; Ld

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a machine cede L d

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tS

ORDER NOW FROM THE DK TRONICS SOFTWARE SHOWCASE

CENTIBUG i £4 95
SPAWN OF EVIL £4^95
MF.TER10DS ' £4^95
3DTANN £4.95

DER5 £495

€XE9 TOOL KIT
•BBCPRGTF.ANSE

BBC DICTATOR * ■
SPECTRUM dictator
HARD-CHEESE

£6 95 ROAD TOAD £4.95

£6.95 JAW2 £4 95

£6 95 SOUND FX £4.95

£4 95 GOLDMINE £4 95

£4.95 MATRIX £4.95

ASTRON £9.95

PISTRON £495

MAZIAC^ £4.95

3D GRAND PRIX £4.95
FRUIT MACHINE £4.95

3D TANK £4.95 SPECTRUM DICTATOR £4 95 GOLDMINE £4 95 3D GRAND PRIX £4.95

T)ER5 £4 95 " HARD-CHEESE : " t £4.95 MATRIX £4.95 FRUIT MACHINE £4.95

Yon can can^> away DK Ironies software from Boots. W H Smiths. John Menzie s. ^VC l|^^M%jf 5
Lasky's and all good computer outlets. We also welcome dealeT enquiries . ^™ * J . * , ^* u "^^

Please state titles arid quantities when ordering.

Please send me... . @ E

Please send me @ £

Please send me... @ £

Please add on Sup for pip

1 enclose cheque/P O. payable to OK Tronics total £ .

or debit by AcceSS/BarOlaycard No. [ I 1 I I I ] I I j~R F T T "f I

Signature J2± W \ ^

Name ■

Address . , . .

Send to DK Tronics, Unit 2, Shi re Hi 1 1 Ind Est, Saffron Walden,
Essex CB11 3AQ. Tel: (0799) 26350(24 hrs) 5 lines.

Low-Cost Dot Matrix
Printer With Graphics

• Produces
High-Density Graphics Printouts

DMP-10Q, Prints 5x7 dot-matrix upper and lower case
characters on an 8 n line as well as high-density graphic
information or standard 10 cpi alphanumeric^. Features 480-
byte full-line dot -buffer, selectable parallel and serial
interfaces (600/1200 Baud) and adjustable tractor, 4Vfe to
9 1 /2 n . Usesfanfold paper. With ribbon cassette 26-1253

IfenxL

■S)

The Biggest
Name in Little
Computers

See Our Extensive Range of MJcrocamputBf Accessories
At Any One of the 340 Tandy Stores Nationwide!

machine code for your

Spectrum BASIC

ALL-SORT

TM

simple to use

unlimited power

very very fast

brilliant

Write for literature & stockists:

Alan Firminger

171 Heme Hill London SE24

compatible

? %

4?

eys staranrd Spectrum

commands.

tAt Printing spted 120 lines per

minute rn ax

Low cost paper supply.
yf Price includes power supply

and interfacing.

This thermal printer, now available in the U.K., is the

standard printer used with the American version of

the ZX81. The printer plugs direct into the Spectrum

but has a through port allowing the use of additional

hardware through the same connector.

-^ The size of the printer is 7% x 514 x 3Vi ins,

6 ^?e ^>v attractively packaged in a moulded matt

f /3%, "•-. ^Sk. black plastic case

Two switches mounted on the printer allow for

on/ off switching and also access to the test mode

and paper advance commands.

The printing speed in the self test mode is 120 lines

per minute.

The paper rolls are 4% ins. wide and 25 metres in

length.

'%.

*%V

A separate power pack is supplied
in a 2Vi x 3Vi x 2% ins. case.

£99

. Qc Price includes- Printer, power

5= supply, full interfacing, one

roll of paper, VAT and p&p.

^$c

*£>

$9$

r <f r o-

*AJ^*/ ^

^ Credit cord facilities for
telephone wders.

DEAN ELECTRONICS LIMITED

Ql^nrisi? Park F embank Road Aicot Berkihtre England
Telephone Winkfield Row I 0344 > B85661 Telex 849242

DEALER ENQUIRIES INVITED.

IS

SINCLAIR L'SEK September 1983

"YOUR SPEED OF DELIVERY PUTS
OTHER FIRMS TO SHAME

{Paul Backhouse, Tadcaster)

HI

SOFTWARE SUPERMARKET

Mwe do at Software Supermarket is play every Spectrum/ZXSl
game we can and, pick out the very best and offer only those to you

OUR NEW. 24-PAGE. Spectrum only catalogue is out now. (And
there's a special separate ZX81 catalogue.) Free catalogue with
every order.

From over 40 countries now. you write praising out quick delivery
and our free selection service (it's impartial, too: we produce no
programs ourselves.) Ynu say we save you plenty!

And we're quick. Orders usually sent out the same day we receive
them. Faulty tapes replaced at once

You've got a gteat computer. We've got the great programs. Here's
the best of the new and a few all-time greats. All programs work with
keyboard: we have tried to show where a joystick can be used il
you have one Lots more in our free catalogue for you! (Mail order or
telephone credit card only please.)

48K SPECTRUM ONLY

1*7141? £* A W Ev '^* r - tej!wi -' ! arcade scsm gamg so fai ' (S. User) 'Fast a rid 1? A I ICf ' C p* ("If. [ V
1 JJVUlilln 1 Km faiom" much Micro*) KEMPSTCN^KEMPSOFT JOYOTX * *»VM M. U X VUU A

Q.C Watch from your cockpit as you fight the Squarm ; 3D graphics b pley levels tiammg
program- hold ha31 oi lame: loads in 2 n 34K parts: rave reviews everywhere lOiri^ksilva)
£E95

JtIjDIEi 1 tin 1 UK facilities* (Practical Computing) "A great game"
(P C. T) The seat Spactmm ' SCRAMBLE' there is. Amazing graphics . 1 M 2 players.
Training program for each Stage FLUE mnqje CUSTOMIZING MODE - lc%s you, write your
awn 'SCRAMBLE" without all the effort 1 (Melbourne House) £fi_95
hi A f V PD VCT A f "^ eK ™ ite ' Ji graphics adventure " f S. Userj
DuAvA vlf X2)lAli The massive 1B0K d! program 'loads' from 2
cassettes in b chapters You must solve each of the 6 stages to defeat the Loids of Chaos-
leal-time monster battles 16 command keys instruction manual (Cornell) C7.5C
ffiTjr* UADDfT "Takw first place for quality and value for money"

1 flEi fl \J0Dl 1 (S. User) "A mar/eilous game... should set the standard"
,'ZX Cramp/. Free 285 p illustrated book contains clues to help you. 3D beautiful full-screen
pictures: 500 wcrd vocabulary. 16 page instruction, manual: it tsjofc 4 people 18 months to
Wfcte 1 (Melbourne House) i'A 95

<q flfinT ¥ia "Excellen L.&e best adventure game I have ever played" (PCN)
ALDvUJa 20 page clearly written, an-scrcen manual leads yon to very ingenious
3 stage adventure Four stall levels. ?ull tntaimackin on screen plus a map when you used il'

Great tun (CEL)£&.95

/innini nnim * IU f mn "A brilliant new game" (Micro
UA&A I Dill i A1H li 1 Urn User) "About us complex as such
a program can he excellen t value lor money ' Pftltich Micro?) Choosti your party and tun
the country Will unemployment come down oi tire rioters come out? Watch the results of
your ruic on election night (Hessel) £5.95

VHAT ¥HI Ott "The most astounding thingyou'll see for a long th'ne"
TkM\J I in Ov ■npcompttWyl'&W^OWV^.UTSOn'-hGF'WffiOGW

KffSTDC K. Ynu must avoid ooUtsian with your own trail and those of tip to 4 chasers as
you rash through an apparently empty 3D space. Demo mode 3 skill levels: hold: dear
instrjctionB Brilliant ;New Ger-emUOill E5 95

ITW1 f* WV * C ft ¥ lUCT " Jl ** s i0 - ny ^ J ' l]flf * afl "^ - F/a ° fc;f "

lUllUfll 3 UULdl (PbpCompmty) ,, wiil get a great deal of play'
■HmeComp'A'kly) Very user-friendly . literate adventure with 16D word vocabulary. But
remember, dragons arc mote use alive than deadi Cokiurtul pictures of most locations
•;Phipps)C5.9&.

ANY SPECTRUM

Elfl "Musi be at the limit of Hie Spectrum s capabilities. . .graphics sie excellent
i 1 iAi »wf japfmntBan superb' (HcsissCcisipWktyt Enchanting advgntana 16
landscapes: 1^00 po^a 3KIB8 4 skfl levels, in 48K ETX SPEAKS TO YOU AS WELL
KEMPSTOWAGF JOYSTK O.K. (Ahbes) £S 35

nn rt f f< W T*«8 W*y staiiabJe ijrtg A ITM Jfiff ijjecmim . catoirr. sound and
kKUuU X graphics are used superbly. ' MomeCompWkty) The best Frog
there is. we reckon ! ltfflj& in two pans. Uses so much power, you even have to ur.pkig yoar
printer' KE]vrmON.''KFMPSCFT JOVSTTX O.K. (DJLJ C&.95
IfnUf 1 ! 17 nPl I L' II E*i;np« down the pigmy death-run Smaahing
J U ™ t'i*"T- |r El V El A tuli-saeen animated graphics as yen Leap raging
waterfalls, swing on a rope ACtoea deep pits dodge spiders and poisoned blow darts Cood
sound too. Ors-scieen lives, score, hs-score wsth name, lirfte left. Some of the host graphics
we've seen (A&F)£690

nfS DT 1 *-*™ °^ ^ ■' 3est nEW S 311165 tnj5 season You have spi ay cans iul] of
lTw9 1 ■ ntsectiddie to protect your beaiitiii.il, growing flower from -±e evil
assortment of bugs. Will vou beat the bugs? Will you see the amazing bloom? Totally
original and great fan KFMPSTON/KEMPEOFT JOYSTTX K (Ulcimate) £S 50

VKlfll y* ■ ft "Good graphics, with many small touches that put this prjgiam
vEi 1 "trHw well ahead of the pacx' U.W- "nn:mlyoui test pUot space.,
withhisjei-packas you build your spaceship, fuel il up and take off to? a new ptenet All the
irme avoiding the naatiea and collectmc treasure! Wonderful 1 oi 2 players
KEMPSFON/XBMPSOFT JOYSTICKS O.K. {UltuT.atej E5.50.

IITBBftfM/* ¥ A f IF The very latest from [magme's mventive
tlUIUlrlHtl u/lvll programmers Taie ret granted the great animated
graphics (by a 10 hieaT old!) and the marveJousJy aimpie diabobcaljy rngeriKius game which
uses them (his dad wrote it!) 20 levels Lots of monsters as yen get tatiei <it the arcade
action UmaginelEB.Bf}.

■Hard to tmt'(CV&) 'One of the tMt
Sinclair games soiar"(PCW} Very fast
'PKOiNIX', 7 playleveis, 3 attack waves, iasei shield: mothership with smart homtH A
be£t-sellar f . Now 2 versions of the game on this Cape! (Woik Force) £5 00
Q¥\ HI A MV Vneof my favourite programs' (YrCotjip) Shoot the enemy tanks
JU 1 AiV A horn your moving 3D turret. 3 play levels accurate balisstics 1 oi
2 payers' j>auyH riemn game training program, even plays God Save The Queen
; TjK 'ironies j£4.9b.

The hrsl adventure we' ve seen that's worth
playing in 16K. I: s great and it's graphicl Loads
in 1 pails' clear instrusthns :hen a smashing adventure with directions, inventory, leak,
score, save. lAbbex'l £6.95.

WINGED AVENGER

ZX81 OWNERS

Special IfiK ZX81 v«nioiu of 4 of th*M progranu an available, Uh th«
coupon to order Or phone bow lor your FREE ZXBl-ooiy catalogva,
BLACK CRYSTAL C7.50 WINGED AVENGES £5,00

KNIGHT'S QUEST £4.95 FROGGY £5.95

CHARGE PROGRAMS TO ANY VISA CARD
CALL 01-789 8546 (24 hours)

I 1

To: Software Supermarket, 87 Howard' i Lane, London, SW16 6NTJ.

11 yi>u do not warn to cut this magazine, write your order out caief-jily or. piain
paper and quo f je rhiK n umb er rom
1 own a 16K Spactrum ^ 4&K Spectrjm \_ ] 16K ZX.31 \_ J [please BE*).

I enclose my Chequ&'TO for £ payable :d Software Supsrmar kel

Reese use bicek capiiais. 11 we can't read it, you 'won't get it

Name

Address

Postcode

Phone, if any tn case wo have a qu«y

Program Name

rjamputei

PUC*

E

£

£

£

£

C

POSTAGE
PACKING

OR Ar1(1fib[>ftn]\pe[oidar

eotop

EUROPE Add 55p fci each Fiijaiafii

O'JTStDEEUPO^E Add £1 (oir each- pj-ogwm autnail

y

TOTAL

SINCLAIR USER Sspi^nt>er t$83

Last chance

to win

a fortune

Join the fight to be the best Sinclair Programmer.

There are thousands of £££s to be won in the contes

to find the top software writer of 1983.

w

THIS IS THE LAST chance for
programmers, old and new, to
earn a fortune and the fame
resulting from winning the Cambridge
award,

With The closing date of September
20, this is the last issue of Sinclair User
in which we will give full details and the
entry form. So do not delay. Make sure
that your entry is bug-free and ready to
reach us by the closing date.

In this new competition, the Cam-
bridge Trophy, sponsored jointly by
Sinclair User and Computer Cases Sim-
ulation Ltd, we are searching for the
best writers ol programs for the Spec-
trum and XX -SI . We are offering a first
prize of £1,000 plus royalties to the
person who proves deserving of the title
of Winner of the Cambridge Trophy
1983,

The trophy will be awarded annually
with a different theme each year. In
1983 the theme is adventure and strat-
egy games. The judges will be looking
for a number of (actors when making
their decision. They include:
Instructions
Program documentation
Graphics and sound
Payability
Lasting appeal

Innovation
Use of machine.
As well as the first prize of £1,000,
which can be won by programs for
either the Spectrum or the ZX-8 1 , there
will be two second prizes of £250, one
for the Spectrum and the other for the

ZX-81. Similarly there will be two third
prizes of £100. In addition there will be
10 runners-tip prizes for each machine,
consisting of five CCS programs and a
free annual subscription to Sinclair
User.

Fill in the form for your passport to
fame and fortune.

The award will be judged by three
people well-known in the world of Sin-
clair computers— Mike Johnston, organ-
iser of the highly- popular ZX Micro-
fairs and consultant editor of Sinclair
User; Trevor Toms, author of a number
of books on the Spectrum and the ZX-
81; and John Gilbert, Sinclair User soft-
ware reviewer. The panel will be
chaired by Nigel Clark, editor of Sin-
clair User, and Melvin Lloyd-Jones, a
director of CCS,

40

SINCLAIR USER Septmbtr t983

^^

Cambridge award =

Conditions

• Entries must be on cassette ac-
companied by a listing, detailed expla-
nation of the program and an entry
form. Entrants musi warrant that ttu.it
programs are original.

• Programs only for the Spectrum
and ZX-H1 will be considered.

• Entries must reach Sinclair User
at 196-200 Balls Pond Road, London
Nl 4AQ, by Tuesday, September 20.

• Results will be announced at the
Christmas ZX-Microfair in December.

• The entrant assigns CCS the ex-
clusive licence with the right to sub-
licence, to copy j modify, sell and
publish rhe original or modified pro-
gram in any form and CCS undertakes
to pay a royalty lee of 20 percent of the
nett invoice price on the sale of such
program(s) and further will pay a fee of
£10 in respect of each publication of the
respective program listing. CCS assigns
ECC Publications the exclusive world-
wide rights to publish the listings of all
entries.

• The winning programs shall be-
come the property of CCS, which un-
dertakes to market the programs and to
pay the winner a royalty and fees as
detailed.

• The organisers retain the right to
oiler any entries for use by Micronet on
an agreed royalty basis.

• Entries will not be returned.

• The judges 7 decision is final.

• No correspondence can be en-
tered into between entrants and the
organisers,

• Employees of ECC Publications
and CCS and their associated compan-
ies mav not enter.

ENTRY FORM

I agree to abide by the rules of the competition.

Name *.„ ,

Address ; ...............

Postcode ,♦„,.»,... Signature

Send your entries to ECC Publications, 196-200 Balls Pond
Road, Islington Nl 4AQ.

I __, . I

SINCLAIR USER September 1983

\\

That's the name of the game with our new range
of Strategy Games.

Take Autochef for instance
You'll have to make every decision possible, from
buying food and wines to entering into loan
contracts with the ambition of taking over your
biggest rival

How does wheeler dealing in the heart of Texas
grab you? In Dallas, you'll need all your wits
about you to survive in the oil business and
maybe even take over the Euing Empire,

[f you'd rather keep your feet firmlyonthe
ground, run a wheat farm with Corn Cropper.
There are many decisions to be made on
machinery and labour costs, when to plant
irrigate, fertilize and harvest
Print Shop offers you all the problems of a
thriving printing business - from staffing to
buying stock and making quotations.

Whatever your taste - whatever your skills we've
got a challenge for you!

Fly high with Airline and really get the business off

the ground - that is if you can handle the Autochef, Dallas, Airline, Corn Cropper and Print

costing problems, strikes, cancelled flights, Shop- ZX81 and Spectrum 16K £5 each

hijacks and aircraft crashes. Spectrum 48 K £6 each

Available from W H Smith, Boots, Rumbelows and all good computer shops or Cases Computer
Simulations Ltd., 14 Langton Way, London SE3 7TL.

Ipiiimw >n

CORN
CROPPER

idno*

fl|iai Iiiiib tttt

DALLAS

f S£l

TRATEGYRAVC

AUTO
CHEF

J ■ J

AIRLINE

STRA? EGY GAMES

STRATEGY GAMES

STHATEGrr

<X Strategy Games.
They're no pushover.

'?*&*
*>*&

& *&

42

SINCLAIR USER September 1983

SPECTRUM
COMPUTING MADE SIMPLE

The Complete Spectrum
ROM Disassembly

For the serious programmer

who wants lo gel right to the

heart of the Spectrum; its 16K

ROM control program. Each

ROM routine is clearly explained

and all f unctions and entry

points within the ROM are made

a vai I atol e f Dr use i n the user's

own programs,

A useful and interesting book.'

Personal Computing News

Spectrum Hardware Manual

An iridepth explanation for the

electronic hobbyist who wants

lo kn ow how the Spectrum

actually works.

The boo k re veals ma ny f eatu res

of the Spectrum hardware

i nd ud i ng a complete rundown

on each component's, function,

full circuit diagrams, and

exciting practical construction

projects.

A wealth of ideas '

Educational Equipment

OVEtTK m
4KCTHUM

UNDUSTANOMG

muRsncniuM

DR. LOGAN'S
MICRODRIVE
BOOK
COMING SOON!

LANGUAGE

ran THE

AISOWTE

Over the Spectrum
30 exciting easy to enter

programs designed specifically
for the Spectrum. From mind
blowing arcade act ion to
i ntrigui ng strategy g ames.
this book will allow the first
ti me user to become familiar
with how programs actually
function.

A ctear winner in the Spectrum
Stakes,'
Personal Computer World,

Understanding your
Spectrum

A complete guide to the

Spectrum software system for

users who want to learn how to

program this remarkable micro

in both BASIC and Machine

Language.

A special section explains how

the ROM can be utilised in the

user's own programs,

"I cannot recommend this book

too hkjhly,"

Practical Computing

Spectrum Machine

Language lor Beginners

A 'no Jargon' introduction
to machine language
programming for Spectrum
users keen to progress beyond
the limitations of BASIC. A self
test questionnaire is also
included.

Trie book concludes with
the development of an enti re
machine language program
from start to finish.

SPECTRUM Books

. □ Dndirclandiag Xour Speclrarn IJ.J5

~ | Spednim Midline Languje fur The Absolute Beginner - . £(.95

|"| DwrTneSpearuPi ... ... .«»

U W (ampler* SftttrumBOWfesaJitirbr? £8.95

□ Sptelru-n ria"*part Mania! £5.»

~j Plow let m» brow when Dr. Logan's Microdnve Boo* is published.

48K SPECTRUM CaswrtM

U Pwetf*tof MM

n Th»H*bil £H.95

D Tamif-IlaMil W £&.-S5

□ Melbourne Draw £B.S5

n P!m» «n* nmour free i t pae,e CatakjEiM

Trade enquiries
»»lcome.

1 enclose my cheque/money order for £

Please debit my Access Card No.

Eapiry Oate

Signature

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All pnces include VAT
where applies ble.
Please add SQp for post
and pack.

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Total

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131 Trafalgar Road

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software ii uncwulifwnalry
guaranteed against malfunction
Access fjrdm can tie
telephoned Through art mn
Z4hi»niaf«w(01>8Sfl;337.

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SOFTWARE LIBRARY

FOR

SPECTRUM

Low cost weekly hire of line best arcade games, adventures,
utilities, languages and business programs.

• Membership only £6.00 for 12 months.

• Program hiring from only 80p (plus 25p p&p},

• Free tufty descriptive catalogue for members,

• New tilles constantly being added.

• Purchase new programs at discount prices,

• Return of post service.

• All tapes despatched using first class post.

• We have fufl permission and liDences from the leading
software publishers, to whom royalties are paid.

Compare these features with our competitors and you wi]l $ee
why more Spectrum owners ere pining the Kernow Software
[ ibrary Join today by clipping the coupon below or send a
S.A.E. for farther details.

fj YES. please send me my free catalogue and selection

shoot, I enclose my CS chequei/Postal Order.

NAME

ADDRESS -

„ TEL . . .

Send to:

KERNOW SOFTWARE LIBRARY

(Dept. SU)

55 ELIOT DRIVE, ST GERMANS
SALTASH, CORNWALL PL12 5NL

A**

i

SJniberfiitp £>ofttoare

LIBRARY OF ADVANCED MATH/STAT/ECON

TAPE 1; MATRIX OPERATIONS SPECTRUM E6.95. 7KA1 fB 96

Side A: Inversion, muki plication, addition, subtraction and stalai ivuihipliL:jirmn al
malnces and vectors within one single program. Any output can in turn be used ah ihe
m[>ui L.-.r ittf next operation without ie-tyiJiiig, Capably 1HK ZNB1: ? 5 > 2 5 . 1 6K
Spactrum: 17 « 17.4BK Spectrum; 48*48.
SiUnt B: Ueit!imMi£i-i1» ill scjuAre uiLilrFL:r3.

TAPE Z: POLYNOMIALS SPECTRUM C6.9S. ZX81 £B.95

SirU* A: Injuries quarfrdlk: equation* 1ft* dr>gr<^ 2 polvnomrnlsj and Nevvlor- Raphs^j,
and half -interval search methods for higher degree polynomials. ComputM ihn mots
with fl digits ol pWJtJOn.

Side B. Vou can plot polynomials in any interval and- e*aitii>iin il-.i-.i- runts, iimrrjmom
points.

TAPE 3: INTEGRATION SPECTRUM f.6.95. ZXB1 £5.95

Sio> A- integration «1 Puncimn^ hy Simpson's and trapezoidal Njlfifl. Also compiles the
area endowed by two functions.
Side B' Plot of integrals. Integration can ba visuaNsed a-n the screen.

TAPE 4: REGRESSION SPECTRUM C7 9S r ZX81 £6.95

Sirin? A: A h, :jhly :1i!«ri:kipnil iiiulliv;drial« M?yn:ssk>ii prncjr.ini fnigturinfj Log,'Ln option On
< L ;n:h Yjiritfljle Ithttl jilkiwiifcg exg]r.»iie?nliflj nnni yrn metric: rcrjnG&sinns). R 7 , corrected n ? .
standard errors, t-statisnes. F-statistics. degrees, oi freedom. Dirbin-Waiten ^ i -■ 1 1 . . i . ■
interpolation Capacity Ino of variables x no of observations): 16K 2X131: 2*^00,
fa x2fau, 10k 140, 16K Spectrum: 2 v 220, & * 100, ID * H) 4BK Spectrum; J* 1000,
5*900, 10s 500

Siih^ B: r a k:[ ol Liver idte reyrrissicji t^. Yoti Can &efc hnw yuur r;pmputr;r draws a best
fitting Ima on a set of numbered data points

TARE 5 [ah LINEAR PROGRAMMING spectrum r7 95, 7xm re 90

Side A: A user friendly optimisation program capable of handling all xmia nT linear

programming problems 1<iny combination of «.-.>. constraints and JCj>, *,<:O r -m

■=:*,-- (i- etgn constraints). Features the caimanics! euuivalwni ur th* primal, v<rfuus ol

■loch variables end the dual. Capacity (rto of variables d no of tonsil aim si, 1GKZXB1.

10*23, 1S*20 20-a-lB, 1 6K Spfrcrrttfin: Ids 10, 4BK Spuvcirum- 1 Q ^ fin 75x40

50x30.

Side B: Solutions oi sjmufnntvxn J^rjiwtions,

TAPE 5|h]: PROFESSIONAL LINEAR PROGRAMMING £14.95

Av. - iiImI>Im l:jr 1HK ZXS I Ailct 4BK Spei:EriNn MUlfh mI::ivp S:;iE(ir4?^ plus 'save-dete' and

ciiange-data' facilities, Any single data entry can be changed toiiftom re-ivp"".; rbi
wrkiifo rl^*la.

Cheques payable to:
UNIVERSITY SOFTWARE
29 St Pcicr'-s Street
London Nl 8J9

• Al im;l priCBS (or the UK.

! apes 1 - blal Spectrum £38

V$ ^r> G

SPECTRUM

ZX81

CAl AC flC ATTACK

SPACE MISSION

LUNAH LANfltR

PLA&MA BOI T

ST A« TREK

HAT1AR lANDINLj

ATTACKER

fi A LAC TIC DOGFIGHT

Z*OM ATTACK

IVASIVt ACrTlOfJ

oxo

BOGGLES

1-ONTOON
SKI JUMP
HANGMAN
OLD BONi S
THIN ICF

MAZE EATFR

OR&ITTER

MOTOR WAV

FORCE FIELD

MM

TUNNLL LSCAPI

DATiFILL JUMP

CANKONtJALLKAl 1 LI

OVI H 1 AKh

?.ii r r i ml; i a^uii i

SMASH THE WINDOWS

SPACE SHIP

JET FLIGHT

PHASER

INTHIJFJF, H

INI I UNCI

GHOSTS

SUH MARINES
ROCKET LAUNCH
PLANEIS
BLACK HOLE
DYNAMITE
DO V fJUR SUMS
DERBY DASH
SPACE SEARCH
UNIVERSE
RATS
1ANKI I
PARACHUTE
JF IMGBILE
HlCH RISE
THE FORCE
EXCHANGE

WE BUY GAMES CONTACT US NOW

I
t
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I

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PLEASE SEND ME SO GAME5 ON A (_:*S5f TTE F-TJH Ml _

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SU

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44

SINCLAIR USER September 1983

SPECTRUM & ZX81
EDUCATIONAL SOFTWARE

SPECTRUM FAMILY LEARNING SERIES

UbL 1 flur Computer Assisted Learning PACks to help your children with
their school work- Trip programs in the series use moving colour
graphics and sound' to make learning muru enjoyable Each pack
contains four programs and is s^itsble for use with iha 16K or 48K
Spectrum. Piugram notes are s-Ljppti&d.

CALPAC FL1 [5 to S yaars) £9,50

TefiS and units addition and Subtraction with defaced help facilities;
powerful, easy to use drawiny program; English comprehenaian applied
i!) American Indians.

CALPAC FL2 17 to 1 years i Cfl-EO

Roman history; spelling tester with easy entry of your own lists: flexible
table-tester; homophones.

CALPAC FL3 <9 to 1 2 yM*s| €9 60

Nouns, verhs, adjatlivos and adverbs; tenses of verbs; bitHooy of the
flower; Lnng division tutor.

The programs are ideal fur cite ages stated, but could tve uspri hy anyonu

requiring revision of these areas of Study.

CALPAC C1 O LEVEL CHEMISTRY

£6.50

Four dearly presented revision/tuiofiul programs. The subject matter-
has been Carefully Structured tn cover the must important aspects Of:

* LI emeu IS, compounds and mixtures.

* Structure, bonding and properties.

* Redox, electrolysis and the activity series.

* Acids, hases and sails;.

43K Spectrum and iSri ZX8f versions of the cassette are available.
Pfvase Specify which you require.

Professional Computer Assisted Learning materials from:

CALPAC COMPUTER SOFTWARE

108 Hermitage Woods Crescent, St Johns,

Woking, Surrey GU21 1UF.

AT LAST A SPECTRUM'

COMPUTER DESK
THAT HAS EVERYTHING!

In Tough Black ABS

High TV. backstop
Ideal For odd- hiii 4

nuTlnt pLg,g socket
{not supplied)

Transformer hollo*
/

E»iy acce**
computer recess

Twin, cable retaining
clips supplied

PrintiT v»*||

nr tape storage

Just

£16.00

+ £2.0Op&p(irtcVATl

ZXai Desk

£15.00 +«,«p£p(">evAT|

PH. Scientific Products
9, Soulhf ieid ,
Welwyn Garden City,
Herts. TeL( 07073)^0^41

i

A SPECTACULAR DOUBLE BILL

SPECTRUM (48K), ZXB1 (16K), BBC B
DRAGON 32, COMMODORE 64, ATARI

■

CONFLICT

I ft JJwtf i-'gH tiujhBtf and Cfatfte giog l>ni»tffctt fti**^

rf#* **; J

■.X&,

Continuing for the season
YOUR SELF and ANNE UTHER

in a fantastic game of

... a powerful experience , . ,

... a world on the brink of holocaust!

a completely unique two player computer moderated
board game of cunning and strategy. You will ex-
perience alt the strain and excitement of hawing total
control' of a nations resources and military forces in
time of crisis. Will you achieve victory ... or the
disaster of defeat!

■ IM ' "

ALAXYCONFUCT]

afifjKitBiBandChaftsr^

tltr:<>: BUM *itm*i«. ♦*" —IH mt> <^dj» ■

The latest Science fiction EPIC starring

BUG RAMPOKE and LEN STRING

in a brilliant game ot

UNIVERSAL DESTRUCTION

. . . mind blowing excitement . ■ ■
... a war between two distant galaxies!
— an inten&e two player computer moderated board
game which makes you the all powerful leader ot your
galaxy s destiny. How quickly can you understand the
forces at play — and rid the universe of your enemies
presence. Definitely not for the early lo bedders!

DONT MISS THEM . . .
at your local outlets now!

Version 1: ZX8t (16K)/ Spectrum (48K) £1195

Version 2: BBC B '/Dragon 32 C 14.75

Version 3; Commodore 64/ Atari £14.75

or mail orders (inc. P 4 P) to our box office:

mctrtcch

9DilliiigburgliRd.,Eastl)ourne.SiisseiiBN20BLy.

SINCLAIR USKR Sepcmtbcr 1983

45

ncnoTccn

The Complete Bang

Fifteen months ago Memotech developed the first 64K Memopak, designed to maximise the capabilities of the Sinclair
ZX81. Since then, using the ZX81 as a starting point, we've gone on to produce a comprehensive range of Memopaits,

adding 16K and 32 K memory expansions, utilities packages comprising a Word Processor, ZSO Assembler and

Spreadsheet Analysis, plus Communication Interfaces, High Resolution Graphics and a professional quality Keyboard.

To complete our range of ZX81 add-ons, we are now introducing the MEMOPAK RS232 Serial Interface.

RS232 Interface

Trie RS232 is an all-purpose interface
which allows the ZX81 noi only to
output to suitable serial printers, but
can link up with numerous types of
peripheral or even other processors.
The Interface has two main modes of
operation ; BASIC mode allows you to
use the range of functions supplied in
the RS232 EPRGM within an ordinary
BASIC program, and TERMINAL
mode allows you to use your ZX81 as a
terminal to another processor.
The EPROM functions offered permit
The user to send, receive and convert
bytes between ZX81 code and ASCII,
as well as check the status of numerous
control Hags. Received or transmitted
data can appear simultaneously on the
screen, and received data may be
primed simultaneously.

£39.95 inc. vat

Memopak Centronics
I/F

Ihe BASIC commands LPRINT,
LLIST and COPY are used to print on
any CENTRONICS type printer- All
ASCII characters are generated and
translation takes place autontatically
within the pack. Reverse capitals give
lower case. Additional facilities allow
high resolution printing.

£24.95 inc. VAT

Memopak HRG

This pack breaks down the constraints
imposed by operating at the ZX8 1
character level and allows high
definition displays to be generated. All
248 x ]92 individual pixels can. be
controlled using simple commands, and
the built in software enables the user lo
work interactively at the dot, line,
character, block and page Levels.

£29.95 inc. VAT

Memocalc

The screen display behaves as a
'window' on a large sheet of paper on
which a Table of numbers is laid out.
The maximum size of the table is
determined by the memory capacity,
and with a Memopak 64K a table of up
10 7000 numbers with up to 250 rows Or
99 columns can be specified.

£29.90 inc. VAT

All Prices are inclusive of VAT, postage and packing.
To Order: Send your Name , Address, Memopaks required, plus a Cheque/Postal Order/Access/Barclaycard number (please state
which) to: Memotech Limited, Station Lane Industrial Estate, Witney, Oxon. 0X8 6BX, Telephone Witney 2977

We want you to be completely satisfied with your Memopak - all our products carry a 14 day money back guarantee.

Memotext

Test is first arranged in 32 character
lines for the screen with comprehensive
editing fac ilitics. On output the user
simply chooses the line length required
for printing and the system does the
rest. Used with the Memopak
Centronics Interface, the Word
Processor makes available printout with
80 character lines, upper and lower case
and single and double size characters.

£29.90 inc. VAT

Memopak

Memory

Extensions

For those just setting
out on the road lo real
computing, these packs
transform, the ZX8 1 from
a toy to a powerful computer
Data storage, extended program-
ming and complex displays all become
feasible. Further details available on request.

1ft K Memopak 04.95 32K Memopak £34.95
o4K Memopak ii+9.95 Prices inclusive of VAT
MEMOPAKS ARI-: AVAILABLE AT MAIN
BKANU II: S OF WH SMITH anJ JOHN MENKES

Z80 Assembler

The Assembler allows
you first to code and
edit a source program in
the ZSO language, and
then assemble it into
machine code. You can
now write flexible and
economic programs -
The Editor mode
allows you to code
directly in the right
format, manipulate
individual lines and
control the exact placing
of source and machine
code. Routines may be
merged or listed (even
to a commercial printer
using our Centronics
Interface). The
assembler mode handles
all standard ZSO
mnemonics, numbers in
hex or decimal,
comments and user-
selected labels.

£29.90

inc. VAT

Memotech Keyboard

The Memotech plug-in Keyboard plus buffer pack takes the
effort out of data entry for ZXSl users. The Keyboard has a
Light professional touch and is housed in an elegant
ahi in in ium case. The simple plug-in system means thaT vnu
are not obliged to open up your ZX81, use a soldering iron or
invalidate yourZXSI warranty.

Keyboard Buffer Pak

The Buffer Pak performs a "housekeeping" function for the
Keyboard* interfacing directly with the port o( your /XN] ,

£34.95 inc. VAT

46

SINCLAIR USER September 1B83

55

EAiUfL

ARNING

Announcing an
exciting
range of early learning
software for the SinclairZX
Spectrum- 16K and 4SK
Specially produced for
4 to 6 year olds by the
largest educational

publisher
in the

Colourful, action-packed
games to teach those vital
word and number skills.

Hot Dot Spotter ■ a gome of

soeed and sfcill that teaches number

recognition.

Count the dots (between 1 and 9) and

watch me laser beam bounce ih& boll up

the screen. Build up speed and $ea*& lots

q' points

a, b,C... Uft-Off! ■ an exciting

inrfacJutfton lathe alphabet lhat teaches

tne letters in correct order.

Page Ihraugh Ihe alphabet piclure boc*

and help load ouf spaceship la Venus by

molchlng pictures and words.

See lift-off with full sound effects I

All programs come with
6 pages of Parents' Notes
providing complete
instructions for use.

COUntabOUt - Teaches simple

addition arid subtraction..

Help our mic ro chimp reach Ihe bananas

at Ihs top of the tree by getting Ihe sums.

right.

Longman Software can
be used by children on
their own or with initial
help from mum or dad.

Available from W. H. Smith, Boots, Menzies, Martins and other
leading chain stores, as well as from computer shops ana
through Websters, Software Directory
Tra de ova i la bi I ity fh ro u g h Prism M icroprod ucts.
In case of difficulty, or for a full colour brochure, write to:
Division GS4 (Software) Longman Group Ltd, Longman House,
Burnt Mill Harlow Essex CM20 2JE Longman Software -

LONGMAN SOFTWARE ««« The Key to Early Learning

SINCLAIR USER September 1983

47

FOX

ELECTRONICS Presents

iN 6 *,

SPECTRUM
UPGRADE

Wk KO

(issue 2 machines only)

A high quality kit at a new Low, Low Price, which simply
plugs into existing sockets within your Spectrum. No
soldering is required and step by step instructions are

PROBABLY THE BEST KIT AVAILABLE AT DEFINITELY

THE LOWEST PRICE

Should you require any more information on the kit (or any other items). Please phone

or write to us at the address below.

£29-95

INCL

SPECTRUM/ZX -81
FULLER FD42
KEYBOARD

FOR THE SPECTRUM OR
ZX-81. A42 KEY FULL
TRAVEL, CASED
KEYBOARD WHICH
YOUR MACHINE SITS
INSIDE, PLUGS IN
(NO SOLDERING REQ).

SPECTRUM JOYSTICK

A DELUXE JOYSTICK CONTROLLER COMPLETE
WITH INTERFACE AND

• CONTOURED GRIP

* 2 FIRE BUTTONS

• 4 FEET OF CORD

* 4 SUCTION CAP GRIPS FOR TABLE

TOP CONTROL

£19-50

DEALER ENQUIRIES WELCOME

Many other Products

SEMO NOW TO-

FOX ELECTRONICS

141 Abbey Road. Basingstoke, Hants. Tel: 12 5 6 20671

AVAILABLE EX-STOCK
Sand :1AE ior derails

WALLERS WEICQME
1Y APPOINTMENT

ZX-81

THE BEST AVAILABLE EXPANDABLE RAM PACK AT THESE
NEW LOW PRICES!!

z

X
8
1

16K

£19.50

» 45p P&P

32 K

£34.00

+ 45p P&P

Tria 2 X -Panda a specially contoured unit designed to Eliminate
wobWe and. memory loss, housed in a very attractive case lAiith red

LED on/off indication.

ZX-81

Another replacement keyboard-this
one with a calculator type feel. Pee!
off backing and press to fft.
Incredibly low
price of

£10.00

Z
X
8
1

i

3D Games

The technique of 3D has been growing in popularity. John Gilbert
finds it is not always used in the best ways

Extra dimension adds
excitement to games

THREE-DIMENSIGNAI . games
arc increasing in popularity and
software houses arc beginning
to see that 3D techniques have great
potential in a market where Space In-
vaders and Pac-man are rapidly becom-
ing outdated.

Programmers are starting to use
sophisticated techniques to achieve
three-dimensional effects, on the com-
puter screen which seem more life-like
than the two-dimensional space-barde
games.

The effects are difficult to create, as
the programmer is working in three
planes, or directions, instead of the
usual two. Most shapes are produced on
the screen using X and Y co-ordinates
which correspond to the flat horizontal
and vertical dimensions. Three-dimen-
sional shapes are constructed using an
extra axis which s in theory, moves away
from or towards the computer screen.

The new axis is called Z and it is the
inclusion of that dimension which gives
the three-dimensional figure its depth.
When a 3D shape moves up, down and
sideways it uses (he X and Y dimen-
sions. When it seems to move towards
you on the screen it is using the Z axis,
which exists only in theory, as the
computer screen is flat and two-dimen-
sional in shape.

J K Grcye was the first company to
produce games using three-dimensional
effects on the ZX-81. The game was
called 3D Monster Maze and the play-
er had to move around a three-dimen-
sional maze to find the exit and also to
evade the deadly jaws of the dinosaur
which prowled around the corridors

Even those critics who dismissed the
ZX-81 as a child's toy had to admit that
the program was innovative and well-
presented. Monster Maze marked the
rise of the use of 3D techniques on
microcomputers as small as the ZX-81
and Spectrum.

After the release of 3D Monster
Maze, everyone could see the potential
of three-dimensional games and utility
packages on small machines. Using 3D
techniques programmers can portray
events which seem real to computer

users when they are playing a game.

Three-dimensional effects also hide
the inadequacies of the computers on
which games are played. The dinosaur
which chased the player around a maze
in the New Generation game was cre-
ated using the standard ZX-81 character
set. That is not noticeable when the
game is being played and you could be
forgiven for thinking that it used high-
resolution graphics.

The use of 3D gives a game added
depth but at the same time it can also be
used to disguise a poor plot.

The latest game fron New Genera-
tion Software, 3D Knot, is an example
of that. While the game has a basic plot
it is not deep enough when you strip
away the 3D effects. That does not
make it a complete failure in this case
but it points to the fact that three-
dimensional graphics arc a means and
not an end.

There are two types of three-dimen-
sional effect. The first, and simplest to
produce, is shown in the Artie Comput-
ing game for the 4SK Spectrum, Com-
bat Zone. The three-dimensional
shapes are shown as line drawings with
no shading. That means you can see all

the lines of the shapes, including those
which would normally be invisible if
colouring and shading had been added
to the figures.

Combat Zone, like so many other
pieces of software for the Spectrum, is
not new in concept. It is a version of the
arcade game of the same name, Al-
though the graphics are reasonable the
animation of the line-drawn shapes is
very jerky.

The plot involves the player as the
last of a race of tank commanders,
Enemy tanks and diamond-shaped
spaceships are dotted round the land-
scape and it is the commander's job to
destroy them.

The game involves plenty of action
and credit must go to the programmers
who have managed to produce images
which do not bend out of perspective as
they move. Artie seems to have taken
the easy way out, however, as the pro-
gram is so slow that it must use those
notorious Sinclair line-drawing routines
which are in the Spectrum ROM oper-
ating system.

The Sinclair graphics routines are
not known for their speed, so it would

com inutJ tiff page 50

SINCLAIR t.'JiER September 1983

49

= 3D Games

have been better for Artie to write new
graphics routines into the main body of
the Combat Zone program.

The second type of three-dimensional
image is produced reasonably well in
the Quicksilva 48K Spectrum game^
Time Gate. The graphics for that type
of image are more difficult to produce,
as the programmer has to shade and
colour the shapes to produce a picture
which looks three-dimensional.

If the shading or the shape of the
image is even slightly incorrect the pic-
ture will appear to be distorted and the
effect will ruin the playahility of the
game.

The three-dimensional effects created
in Time Gate show a slight distortion of
image^ which can be noted when an
enemy ship approaches closer to the
viewing screen of the player's ship. The
enemy seems to unfold its wings as it
gets closer and in some cases it appears
as if the fixed wings materialise from
nowhere.

No doubt Quicksilva would explain
that as a feature of the game but all too
often features such as that are errors and
are explained away too easily.

The ending of Time Gate is disap-
pointing, as the three-dimensional tech-
nique seems to have been thrown out of

the window. When you have destroyed
the enemy you must approach its base
planet. The planet becomes larger as if
an approach is being made but the
technique being used is so obvious that
it is embarrassing to watch.

The program uses what again ap-
pears to be the Sinclair high -resolution
routines to draw circles which start
small and continue to grow bigger. As
they increase in size the drawing pro-
cess slows and the technique becomes
even more obvious.

It would have been better to do what
New Generation did with 3D Tunnel
on the Spectrum and create several
separate pictures in memory to switch
on to the screen one at a time in
sequence. That will produce an animat-
ed effect.

If Quicksilva used that technique the
plancl could have been produced in
high resolution at several stages of ap-
proach and would have looked like a
real planet and not a rope mat.

Time Gate has its technical faults
where graphics are concerned but it is
playable. The 3D Tunnel from New
Generation;, on the other hand, has
what can only be described as brilliant
and imaginative graphics but it is
almost impossible to play to the end.

The game takes you and your laser

base through an underground tunnel
inhabited by rats, spiders, toads and a
very impressive tube train. Unfortu-
nately so much memory seems to have
been used to create the three-dimension-
al effects that the movement of the
player's laser base is awkward.

More attention could have been paid
to that area of the game, as movement of
the base is not smooth or quick enough.
That is understandable, however, as a
great deal of memory has been used to
produce the displays. Apart from that
problem 3D Tonne! has the best graph-
ics for a Spectrum game.

There arc still very few 3D games for
Sinclair machineSj although those avail-
able give confidence that this sphere is
developing in the proper way.

In the next few months we could see
a move away from 3D aicade games and
into 3D adventure games. There are
already a few graphics adventures on
the market but they do not use 3D.

As 3D techniques are developed,
computers will be better able to produce
simulations of the real world. Adven-
tures will become more exciting and
arcade games more dynamic. The 3D
field is, however, just starting to de-
velop but it has a long way to go before
perfect holographic images can be pro-
duced on a small computer.

J.K GflEVE f NTEHFHlSESlTD

I

r.

10 Q

UFO

STARFIGHTCft

PVRflMID

ARTIST

4 Gomes plus Menu

THE ARCADIAN

1&44JK SPECTRUM

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i GRAPHICS
VENTURE

J.K. GflEYE ENTEHPRlSCaiLfD.

3DVORE

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GAMESTAPE 3

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OM1 ^i--v luntt H *> J chitwfliiM

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3D VORTEX

l6)4EiKS;k'f-.t;TRIJM

0^

^

&

*&>?>$>

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oAlr £4.95 2

3«riCl vour order to:

J.K. GREVE EMTEfiP RISES LTD,

tC Park St. Batti BA1 2TE

?S\

fa

Phea3e dok hD^eFs
at required tapag:

TRADE & EXPORT /
ENQUIRIES 1

■- '£4.95

WELCOME

3D VORTEX
THE ARCADIAN
GAMESTAPE 1
GAMESTAPE 2
GAMESTAPE 3

at £5.95
■1 £4 95
at £3 g&
Hi E3.9S
at C4.9S.

Name ^J^

Address *0

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Civn$y|*i i.--.i.*?i 1 ir ■ p*fiitB LmI f^m\ 'n«>v mawh-ni
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r"ir Spwd MithbH >ldd* ■■-■ ■—

Chcoii |BM Mm Cviimi H*t

tV»Mlh«l FfUl -t

£5,95

tjirlng. Lend"?, Un»\jfhQfisei copying of
Resale is Sf-ncfV protiittinta.

I enclose a cheque/p.o. for £

madE pa/able Lu J.K. GREYE ENTERPRISES LTD.

w lane* nl CunHlwfli 41* iitrurl bf

3

Upgrade your

16K
ZX SPECTRUM

Now!

The CHEETAH 32K RAMPACK simply plugs into the user port at the rear of
your computer and increases the memory instantly to 48K.

* Fully compatible with all accessories via rear edge connector

* Wo need to open computer and invalidate guarantee

+ Why send your computer away and wait weeks for upgrade

* Fully cased tested and guaranteed.

Why wait any longer?

Only £39.95 including VAT and P&P.

Now make your Spectrum and ZX-81 Talk

The Cheetah "SWEET TALKER" Just plugs into the back of the computer using the existing power supply Based on an
allophone system you can easily program any word sentence or phrase. Fully cased, tested guaranteed and compatible
with all accessories via rear edge connector. Complete with demonstration cassette and full instructions, No more lonely
nights! Simply incredible at £34,95.

16K RAM Pack for ZX-81 £19.75

64K RAM Pack for ZX-81 £44.75

Prices include VAT, postage & packing. Delivery normally 14 days, Export orders at no extra cost. Dealer enquiries
welcome.

Send cheque/PO now to;

CHEETAH MARKETING LTD
Dept SW9
359 The Strand
London WC2R OHS
Tel: 01 -240 7939

32K Ram Pack also available from larger Branches of

¥/

ft

John Menzies

and computers for all dealers

SINCLAIR USEE September } 933 5I

CHILDREN'S EDUCATIONAL SOFTWARE

The MICRO MASTER Series
for 7-13 years (any SPECTRUM)

RESEARCHED, DESIGNED AND TESTED by teachers
with just or>& aim TEACHING- Easy to use — just RUN.

THE FOUR RULES OF NUMBER
{A package of 5 programmes)

This package promotes FAST and ACCURATE calcula-
tion ability at increasingly difficult levels. It is very
EFFECTIVE as can be seen by consulting the enclosed
grading tables for assessments of pupil's performance
(given his age).

LANGUAGE DEVELOPMENT SERIES
HO programmes on each cassette)
To develop VOCABULARY, SPELLING, CONCEPT AT-
TAINMENT, VERBAL REASONING and KNOWLEDGE
OF THE ENGLISH LANGUAGE,

A complete series tailored to each age group. Used for
remediation and, at the highest levels, for COMMON
ENTRANCE etc.

THE FOUR RULES PACKAGE £11.70

LANGUAGE DEVELOPMENT CASSETTE £7.90

(State pupits age) 1 of each £14.50

Cheques to MICRO MASTER, Dept. SU, 94 Airedale
Avenue, Chiswick, London W4 2NN. For further details
phone Or. K. W. Glasson 01 -747 1373,

EXPERIENCED SINCLAIRJCOMMODOflE PROGRAMMERS
REQUIRED JN WEST LONDON

HIGH RESOLUTION
PROGRAMS FOR 1GKZX81

We utilise a SOFTWARE ONLY technique developed by Stews Guars
85c to produce a stable 243 by 224 pixel display. ABSOLUTELY NO
HARDWARE MODIFICATIONS ARE REQUIRED FOR THE FOLLOWING
PROGRAMS:

INVADERS — Game options— one or two players - taking turns ur
playing simultaneously. Adjustable bomb dropping and
missile firing fates. Difficulty increases as game pro-
gresses, Advanced keyboard scanning routines to aid
game playing.

- Fast moving arcade type game, Shoot down saucers as
they dart across trie screen firing their missiles. Progres-
sive 1 difficulty,

— An advanced arcade game incorporating five different

sheets— invaders, galaxian. rortians, meteorite shower

and mother ship, Progressive difficulty,

GRAPHICS The prognwn you've been waiting foil Enables you to use
high resolution graphics in your own programs. Com-
mands arc CLS, PRINT. PLOT. POKE, DRAW, SPRITE and
SCREENOFF. The SPRITE command allows you to define a
shape and move it about the screen at will. Comprehen-
sive editing facilities are provided and the graphics com-
mands are easily incorporated into BA$lC programs. Easy
to follow instructions are included.

SWARM

ZORF

Send ttii* coupon to ODYSSEY COMPUTING,

28 BINGHAM ROAD, SHERWOOD, NOTTINGHAM NG5 2EP.

Tick the programs you require.

Qlnvaders £4.95 |_| Swarm £3-95

□ Zorf £5.95 Q Graphics E5.95

I enclose a cheque/postal order for £ made payable to ODYSSEY

COMPUTING.

Mikrogen is one of the longest established and most experienced
companies in the home computer market.

We market to such names as W. H. Smiths, Software Masters, Psion/
Sinclair Timex Corp etc. We also have our own rep network covering all
retail outlets.

Our reputation has been built on top quality software.

CAN YOU WRITE
TOP QUALITY SOFTWARE

To Supplement our already highly successful range we are now looking
for programs for alt the popular home computers including games,
utilities, education + business software.

If you feel that your programs can meet our high standards then contact
us at the address below or Telephone 0344 27317.

MIKRO-GEN, 1 DEVONSHIRE COTTAGES, LONDON ROAD, BRACKNELL, BERKS,

52

SINCLAIR USER September 1983

L TOWER

i SoMK'I'iilJi.'

Visiting France? Learning French? Learn/revise/prac-
tise your French vocabulary with this unique, animated
program that builds (he Eiffel Tower, Hundred* of
words built in; store your own options tool Which
class will you reach — Master Sunder? Or welder's
mats? Two programs for £9-25 (including VAT)
BBC 'W and Spectrum 48K.

NOTK INVADKKS m u d k

Three superb programs which do just what music
teachers have told us over and over again they want.
Never has learning to read musk been so much fun and
so easy. STAFF 1 and STAFF2 teach bass and treble
note recognition with full colour and sound. INVAD-
ERS lives up to its name — a frantic games forma!
opportunity to increase note reading speed. Name the notes
before they destroy your base! £9,25 (including VAT) BUC
*B*. Spectrum 4SK and VIC 20,

J

J 5

STORY A

OUR first and THE first multi-choke

fa r l story-book for the screen. You've seen
mJUTJ [} ^DifU ll0W popular nralti -choice story-books
are with children. Now your computer
can give them that same thrill AND boost theii
reading skills. Several differem endings pnssihle.
'Picture pages 1 too. A lovely Christmas and
birthday present for £7.95 (including VAT) Spec-
trum 43K and BBC 'W.
DETAILS OF THESE AND MORE FROM (SAE, please):

q

Homr- "I tade inquiries/orders to:

Chalksofl Ltd,,
37 WWondA Road,
Vorthwict, WOWWW
(090 J S31Y2I.

G+M£JC9GF~l — Ibc mnmiiuirx in EDUCATION At- software

Educational orders direct la

our cftuMii^naL disLfibul-arE:

Ward Lock Edicatkinil,

41 Msrylehone I. an*,

London WLM SAX (TO 486 W71).

WIE

A I LDj£ Km
Company

SINCLAIR OWNERS

START THE HEW FOOTBALL SEASOH THE BEST
POSSIBLE WAT, WITH HARTLAHD SOFTWARE'S POPULAR

FOOTBALL POOLS
PROGRAM

The program will list out, in order of preference, the
sixteen most likely score draws; also the sixteen most
likely homes, draws and aways.

The program can pick out those results on the book-
makers' fixed odds coupons that have been given over-
generous odds. It calculates your expected profit!

The program is initialised with the current league table,
You can update these league tables week by week and
save them on another cassette; you can even enter the
Australian league in the summer. In other words, this
program never becomes "out of date"!

All programs are recorded on a top quality cassette
(usually Sonyl and are accompanied with an instruction
leaflet giving brief details of the theory involved.

Prices; For ZXB1 |1 6K]: EB.95; For ZX Spectrum {48 K): £9.95
including past & packing, from:

HARTLAND SOFTWARE

Dept. S, 8 Penzance Place, London W11 4PA

JUST BOUGHT YOUR FIRST

SINCLAIR COMPUTER? SHORT

ON BACKGROUND INFORMATION?

Complete this voucher and get a copy of our FIRST SINCLAIR USER ANNUAL

Reviews ol the Spectrum, masses ABSOLUTELY FREE

of programs for Spectrum and ZX- __ ^^ m ^^ m ^^h ^^h ^^b ^^b ^^h ^^h ^^h
81, software and hardware round Pp,^ rush me m FREE of t|ie F|RST s , HCLfl , R USEfi

ups and much much more.
All you wanted to know about the ANNUAL. I enclose 50p for postage and package.

world's top two selling computers.

Return this voucher to Sinclair

User, ECC Publications, 196-200 Address -

Balls Pond Road, London N1 4AQ

immediately. ; „„., ,

Offer available only while stocks
last.

SrNCLAIRUSER September 1983

53

SPECTRUM

Make the most of your Spectrum, with these
acclaimed books from the experts!

) IMSTANT SPECTRUM PROGRAMMING - Tim
Hartnell. Spoken word C-6G cassette with book
containing many major programs, to teach you
programming the Spectrum from first Steps. The ideal
guide if the Spectrum is your first computer, £4.95,

) CREATING ARCADE GAMES ON THE ZX
SPECTRUM — Daniel Haywood. Full programming
instructions to improve and enhance your own work,
with 17 major programs listed in full as a bonus. £3.95,

J PROGRAMMING YOUR ZX SPECTRUM Tim
Hartnell and Dilwyn Jones. 200 pages, more than 100
programs, to take your through programming the
Spectrum from the beginning. Written by Tim
Hartnell, the most widely published ZX author in the
world. Recommended by PCW, Sinclair User and
Personal Computer Today. £6.95.

) BEYOND SIMPLE BASIC - DELVING DEEPER
INTO YOUR ZX SPECTRUM - Dilwyn Jones.
When you've mastered introductory programming on
the Spectrum, you need this oustanding guide to
enhanced programming techniques and concepts.
£7.95.

) 60 GAMES AMD APPLICATIONS FOR THE
SPECTRUM - David Harwood. Arcade games,
intelligent board games, brain games and utility
programs, they're all here. Just £4,95.

) GAMES ZX COMPUTERS PLAY edited by Tim
Hartnell. Thirty great games for yourZX computer, 15
for the Spectrum, 15 for the 16K ZX81 . Only £3.25.

Interface Publications,

Dept-SC

44-46 Earls Court Road. London. W6 6EJ.

Please send me the books indicated above. I enclosed

Name

Address

NEED TO

EXPAND

YOUR

MEMORY?

t

AEL 16K
RAMPACK

FOR SINCLAIR ZX81
in black case

£17. 00 *+VAT

(inc. price £19.55)
* Special price far limited period only
IVyLLVL M0N1

AEL 16K^"^

RAMPACK

FOR VIC 20 COMMODORE
in cartridge

£33.*5 + VAT

(ire. price £38.45)
HS WARRANTY

Vh% discount on orders over CI DO

Cfiaques/P.O.'s (aid 50p P .& P for single orders) lo:

Akintecti Electronic Laboratories, The Maltfiouse. Bay Road, Gil Ingham.

Dorset SPS 4PE. Tel: (07476) 4591. Telex: 477013

Telephone and written enquiries welcome.

Allow 10-21 days for delivery.

A 1SIK rrCCU electronic

\

New ucllon spots gomes fealure a 3D view o( he game. In loofbail and tenmi
you play one side, me romper pinysthe other The computet <s tasi and hard
to beat Different ski I levels
FOOTBALL

Eoch ptaver can move, shoot eic Ina&penoenny lnciiri*s fouls if ptayeis
colJida.. coiners, throw ins ale. Scale 90 "ninutes plav- Any learn ot names con
be usod Game con. be svuspondocl on/3 playe-r numbers shown 01 the press or

a key Price £5.50.
BIS MATCH SOCCER

Jusl like roclbalt oame txjtfar 2 piayws. Each player uses keys, at his side or the
kevhoard to control nis men. All men can be moved, shoor etc. independently
Prdctitu wilh faoiboS 1heri play yOuf Irian* Ifl trlG big .Tiulun Price £5.50.
SUPf B SOCCEfi

A deluxe version- or the football, Evan faster action, tiarder to beat. Choose
team colours etc. Price £7.00,

TENNIS

Each key plOyS u dinere/ll Slrofce. Move your players anywhere on cotjrl
Computer ptayj a hard oan-ie. Alt -ennis rules used, lust live ih& real filing.
Proper serving and scoring. Plays 3 sols. Animated figures. PRICE £5.50.
TANK BATTIE

3D view trom 1he (ants' lurret of woods, villages, attncltlng tanks etc Srtars can
de&lruy buildings, trtjes ap'ld tJi'omy luriks 360 tl«yiat# luraS movement Pries
14*0.
CAR RACE

yoj drtva one car, the computer the Qthmt. Control your car with steering o«d
drakes. Choice of 2 CfCuIIs. lap counters and lime recorded. Price £3.95.

4uy any 3 games, -gel any gam* fr«»

Winters Lid. Deal SO, 14 Swonnlngflon Ciena. Canlley.
[Xsncaster. S Yorkshire. DM* AJA

(

54

SINCLAIR USER September J983

Buying Second-hand

Purchase of used Sinclairs
needs much care

Stephen Adams plots the pitfalls of the used market

THERE ARE precautions which
need to be taken when buying
second-hand, as most equip-
ment is sold "as seen". That means that
you buy a computer with no comeback
to the seller, as you determine whether
anything works. Here is a simple list of
things to check on ZX computers and it
could well apply to the purchase of
other computers.

Make sure you know what you are
buying. Like buying any computer, first
find what it is you are intending to buy.
Read the advertisements and if they are
for different models make sure you
know what the differences art. Try to
find someone who has one and see what
they think of your intended purchase.
Also ask if you can try his computer to
get the feel of it.

If it has some extra items, such as a
printer — usually called peripherals-
make sure That you know what they are
like, too, as they may be offered with
the computer as a package which may
not be split. There is no point in having
a Sinclair printer without a computer. If
you have no friend to ask, try a com-
puter shop, explaining first that you are
intending to buy a similar machine and
are not just wanting to play games on
the shop computer.

The price of computers is falling
rapidly, especially with the introduction
of new models every year. ZX-81s can
be bought for as little as £20 for the
basic IK model, 16K RAM pack mod-
els about £50 , Prices for Spectrum I6K
and 48 K models are still indeterminate
as Sinclair has just lowered the price to
compete with other manufacturers —
but never pay more than current price
for the computer.

The weekly magazines are usually the
best place to look for a computer, as the
time between an advertisement being
received and published is shorter.
Check what is being offered with the
computer and is included in the price —
does it include postage, for instance, if
you are buying by mail order?

Software should be treated with sus-
picion, as it is no use without the
computer and costs so much initially to
buy. Usually it cannot be sold on its
own, so '^includes £200 of software"

should be treated as unimportant to the
main price of the item.

It is not a good idea to buy from
shops second-hand as they have to make
a profit from somewhere and that
usually means you, the customer.

Is the computer in its original pack-
aging and does it include the manual
and leads which are needed to operate
it? If you can visit the seller, you can
check the computer and equipment

'It is not a good idea

to buy from shops as

they have to make a

profit from

somewhere 5

yourself. Look for worn jack sockets —
they are difficult to replace — which are
spotted easily as the plugs move about
in them. That causes bad contact and
intermittent power supply, crashes or
loss of LOADing or SAVEing, The
edge connectors can also wear out as
they arc only solder-plated and can be
scraped away with over-use.

Ask to see the computer working Tor
at least half an hour — that helps to
detect over-heating problems. — and try
to SAVE and LOAD tapes using your
own tape recorder, if you have one, at
the beginning and end of the half- hour.

Check the keyboard for signs of wear
and see if any of the ZX-8I keys are
"'dished inwards**, indicating over-
heavy use. Those keys will probably be
the cursor keys and will be very difficult
to operate. Also check the TV display to
see if it wobbles about at the side; that is
caused usually by a poor power pack or
over-heating.

If you are allowed to remove the top,
check for modifications to the board .
On model 1 Spectrums there was an
extra IC added which was sometimes
soldered to the board, using flimsy
wires; check that that IC is well-secured
with tape and not wandering about the
circuit board. On model two Spectrums
an extra transistor has been added near
the Z-80A; that is normal and fitted by
Sinclair.

Sinclair printers are often offered as a
package with the computer and are
provided with a large power supply —
L2 amps. Make sure you receive that if
you buy a ZX-81 with printer, as other-
wise neither the computer nor the print-
er will work with the original 750ma
power supply and would damage it.

ZX-8I hardware does not usually
wear out but Sinclair 16K RAM packs
seem to lose their grip with age and can
intensify the original RAM pack wob-
ble experienced with them.

I hope these hints will help you when
attempting to buy a good second-hand
Sinclair computer.

Remember that it is pointless having
a computer unless you want to do some-
thing with it. So make sure it fits the
purpose you have in mind, even if it
makes you decide against a Sinclair.

SINCLAIR USER Septtmber 1983

55

The Hobbit. More of an experience t

a «ayo1
- and so when I f
me i] wBi -^ becai

3ll thefui I d venture

■■
■ s about the game and
II be some time until allol
bo me."

MR J STERN, Her*

■■} received your 'HoW
,"Vould lil< igratulatt

■

rut it beh
JrumtodateJ

CQMPUTI

■sib

mmend I

■
POPULAR €OMP|

'"I am v*r

one i

■ grams 1
e. i * has kept me stum

rrii35

r J

ts are brilliant to*

"Or- cid

andshou : It alone

almost pro^ with a good enoi i

SinelaiJ
bfrit prod

ids
il words

J.R. - "esame

harm

WHAT MICRO

jy have
■■•t game::
• eefsea

j design."

PRACTICAL COWl

'I am the cm

which is

challenging. \ haw
iications of v
'."

MR. D.J. BURGH

prqgra

beeri dor

ghtshaw

trying to conquer it."

SIMON ROGERS, A>

'I have recently pu»> ejj

adventure game 'The ^

greatly enhanced bi oj,

grapi

najjfc: ol

JEREM* CHESTER

SINCLAIR USER

j

Pri^ty Mountains
itsgami
to play far

GORDON BEMPTSTER. ScotlamJ

fianfcs again for an excellent game in The
eatly got my money's
me. Congratulations! '

MR P- RUSHTON. Leeds

COMPUTER WEEKLY

ifanobsi

bit'. Frid

CHRISTINE VERCHttD, Wilts

Melbourne House

than a program

DAVID MAXWELL, London

j

fi

a

EH CASS1DY. '

44

/

EID AND CLASS 7,
Nottingham

POPULAR COMPUTING WEEKLY
COMPUTING

.EY, Stoke-on

a

a

MRS. J RYCRAFT, Northampton

"Hie Hobbit' is a beautifully con-
structed, frantically-maddening,
tortuous, gloriously inconsistent,
thoroughly epooky adventure - far
better than I could have hoped for and
certainly the finest of the dozen or so
adventure programs I have. In short. I
congratulate the four who sweated for
a year and a half to concoct such a
super result."

MR. PETER JONES, South Glum

Nothing is certain in this Adven-
ture, but uncertainty] Add to this the
brilliant graphics that are used to
describe many of the locations and we
have an Adventure that is going to
become a classic for the Spectrum .

P0PULAB COMPUTING WEEKLY

I am writing to congratulate you on
your excellent program "The Hobbit'
for the Spectrum. I wake up in the
middle of the night with an idea and

have to load the adventure to try it
out."

MIL PHILLIP DARLING. Suffolk

A moat impressive package."

CAHJBXPKSsa

...we are not eating food,, .we

aru loeing sleep.,. and It's great! 1
reckon you can guess why. We are lost,
completely and utterly lost, in the
Hobbit program. 1 '

ME. JOIiN HARKS, Kuwait

.. .one of the most complex games for
the Sinclair machines I have seen ..."

SINCLAIR USER

Orders to:

131 Trafalgar Road,

Greenwich, London SE 1

Correspondence to:

Melbourne House,
Church Yard, Tring,
Hertfordshire HP23 5LU

All Me I bourne House cassette software is
unconditionally guaranteed against
malfunction.

Trade enquiries welcome.

[J Please send me your free 48 page

catalogue.

Please send me:

48K SPECTRUM

□ The Hobbit £14.95

L Penetrator £6.95

Terror- Da ktt[ 4D £6.95

] Melbourne Draw ,£8 95

P lea se ad d 80 p tor post and pack £

TOTAL £

I enclose my I J cheque

I - ! money order for £

P I ease deb i I my Ace ess card No. ...

Expiry Date

Signature

Name ,,,...,.

Address

.80

Postcode

zx computing

Access orders can be
telephoned through on our
24-hour ansafone (01) 858 7397

". . a really professional program for a mkr&-cornputsr
.100% value for money" Home Computing Weekly,

MAI1ELQ

Bridge is more than just a card game. Ir is
a compulsive hobby and n means of making
friends wherever yon go.

For the beginner the problem is how to
learn the game. Where do you find ;i good
teacher? Where do you find the patient
partners you need while you learn.'

Bndgemaster overcomes these problems.
You bid and play the hands in exactly the same
manner as you would At the card table. The
computer supplies your partners and Terence
Reese, a world expert, coaches you through all
stages of the game*

The package contains commentary tapes,
computer tapes and a useful reference book -
everything you need to learn bridge.

For the Sinclair ZX Spectrum 16/48K -
€24,95. For the ZX81 16K - £19.95, ZX81 IK
£19.95*
Available from Boots, WH, Smith and other leading

computer stores or direct from Bridgemaster,
Dept. SI, FREEPOST, PO Box 163, Slough SL2 iYY.

TWri in* InJi VA1. : .n-,r :,nif ^clung. t : hequt!:, & FCTs (tumid he m.idr payable eo BlidgetniBlxr

EASY TO FIT.
CHIPS JUST
PLUG IN.

NO SOLDERING.

SENT WITHIN 10
DAYS

ISSUE TWO
MACHINES ONLY
(BLUE KEYS)

S. A. £. for details,
please.

DISPLAY INSTRUCTION SHEET

Get the best possible results from your Spectrum.
Deals with yellowish white, wobbling colours etc.
Send £1 plus Stamped Addressed Envelope

MAIL ORDERS ONLY, Ch&ques/P.Os to:

FOUNTAIN COMPUTERS LIMITED

Bishops Court,

Bishopstoke,

EASTLEIGH

Hants, S05 6PE

(0703)616505

SORRY, NO OVERSEAS

ORDERS ACCEPTED
(including BFPQ, Channel
Islands Bnd Eire I

mm

lit

m

trtwin l t*"tttttSl II IK J3H. 5
... IS? m It jlj ,S"i!, U

«...*■. ■■» v.* .. +•+ .*. »•« ff

-a IT

* Ml
tit

■UU.

mmmt

DEPT SP, 9 TWEED CLOSE, SWINDON, WILTS SN2 3PU
Tel: (0793) 724317 Trade enquiries welcome
Export Orders: Please add £1.00 per tape airmail

'. WHAtmWim iii

"-j— '-■"■-■- "

ZUCKMAN

ZX81 (16KJ

+ ALL MACHINE CODE

(10K)
*FOUR INDEPENDENT

GHOSTS
* HIGH-SCORE 'HALL

OF FAME'
'AUTHENTIC ARCADE

ACTION
•TITLE/DISPLAY

MODE
ONLY £4.95 INC. P&P

FROGGY

ZX81 (16K)

'MOVING CARS r

LOGS, TURTLES
'ALLIGATORS,

DIVING TURTLES
# FOUR 'SCREENS' OF

ACTION
* ALL ARCADE

FEATURES
'ENTIRELY MACHINE

CODE
ONLY £4.95 INC, P&P

*<£ ZX Spectrum *£

V FROGGY 16Kor48K ♦

SPECTRUM VERSION OF

ARCADE GAME WITH FULL ARCADE

FEATURES:

* Fabulous Hi-Res Colour Graphics

* Authentic Sound Effects > 3 Tunes
+ 3-D Logs, Swimming S Diving

Turtles
+ 3 Lanes of Multi coloured vutaclvs

* On screen Score, Hi-Score, Time-hat

* Snake, Alligators aid Baby Frog

* 'Tap 5' High Scar* Initials table

* Demonstration Game routine

Yotfl KfiiYie-aick frog must leap across a
busy main roadi th<?n onto logs and
turtlES in ttw rivar Hi reach safety of
the- river-Sank frog -homes. THIS
MACHINE -CODE GAME MOST BE
SFFNTO BE BELEIVEDM

ONLY £S.9S INC. P&P

58

SINCLAIR USER September 1983

SPECTRUM

'{7

5.ECTB

Jd&*

IBk.

ORIC

^j?f3r

watch nus

SPACE

Barnes for

SPECTRUM

CPMB4

Softek software for the Speclrurn Dragon

and Oric shou Id be avai lable i n mqst major
outlets such as W. H. Smith. Lasky's.
Spectrum and selected branches ol
Menzies as well as through our nationwide
deafer network Alternatively fill out this
coupon and we'll rush you your Sotlek
game by return of post!

WAttNtHGt AH programs $te SQ<d according iw So*»* *
tefmso^frad**K»ainrtiltonaof sale Copies of wnicft
aw 3t»t3tse on pewm&t

All Softsk software comes with a perpetual
guarantee. Should it ever Oil to load return it
for s full relund. II the tape shows signs of
physical damage then please enclose El .50
10 caver costs,

SOFTER SOFTWARE

1 £,'13 HENRIETTA STREET. LONDON YYC2

*J5!U |££ ™™ ES; □£ E .% x ^^Zn HLYACCWIWt)LrTlLmE5FOT,w

MEGAPEDE ^]E5.95 SUHfcHMtlfcQHS f-)£6.95 wtl,l ™" u

MCWSTERS DRAGON 33 l NAUf

INHE-IL |£5.9S MONSTERS Q£fi.9S nnvt

ACDIRESS

I Plaase send me (he games as tickets

SOFTEK SOFTWARE

Tcial cheque'P.O. findosad £ : payaUetu ■SOfTEK' 12/t 3 HENRIETTA STRFFT I ONDON WC2

48K SPBCTRUM

'

m

' .

■ \. '

"" H - 1

- ^H

SnW^ 1

A ra

HI

JmX&Ul

■

tJjab

■

n

lffwip'

.: : /■

5?2Plr

■

■

<■

**^5l^9Bc

AnDFnXV

H

^^T'

■

* jpyL i

^#i^K | *

M0V1

.<•"'

HEEg

VALHALLA <S Supplied on a 4SK Spectrum program cas&etie, with VALHALLA
player manual and presentation box. As VALHALLA uses the lull 4BK RAM
micradnvesanri Ml-size printers a'e not supported. «K punter optional

VALHALLA is normally available from stock, and orders are despatched by
reium. if, for any reason we are unable lo fulfil your order within 14 days of
receipl, we wril notify you.

VALHALLA cassettes carry an unconditional lifetime replacement guarantee.

TO ORDER: [UK Orders Only} Simply complete ihe coupon, and FflEEPOST
with your cheque/ P.O made payable 10 LEGEM D (UK Mail Order j.
Credit Card Orders: By phone 9-5.30 Mon to Fri staling name ar>d address.-
Card Mo. and tern;s; required.

RETArLEftS: Please coniact your regular distributor or LEGEND (Trade
Distribution} at (he address below.

LEGEND (UK Mail Order) FREEPOST
t Milton Road, Cambridge CB4 1UY
(0223) 312453

MOVi-SCFt OPE HATING SVSTEH UNDCfl LICENCE.

Effl@ttfM&

Post 1o - LEGEND (UK Mail Order) FREEPOST
1 Millon Road, Cambridge CB4 1UY

Please send me Copy/copies of

VALHALLA (or the 48K Spectrum.

I enclose cheque/ P. Q for C

l£ 14.95 each incl. VAT and P&P) w

Or I wish to pay by Acce ss / Bare lay cardV Visa

CardNo

Please print name and address

Name

Address

Credit Carp holder's signature

l r

r^iji

I'

fmuw

an enthralling adventure
with graphics for the
L A 48K spectrum

tne

crttf

ctf

\s

^^w

fo^'.^o^ 6 ::"^

\S^ tS

vn

***»

rjft

ft*

More from the
HEWSON range

it [>ms from this advertise me nl are
available through W. H, Smiih.
larger branches of Boots and a
leading micro computer retailers,

1 CDUHIRtFS
W NIB Iff DRIB

1 : HtAMflDW

^^^ **" ewauLt juvt*

Please rush me

(Tick boxes as required)

■

i i miH iiTi

H QUEST ADVENTURE C5.9&

3 NlGHTFLITE CS.B9
CH HEATHROW A.T.C. E7.BS
D SPECTRAL PANIC CS.9S
I I MAZECHASE EiB5
CUbPECUADERS C4.05

J BACKGAMMON £S-99
H COU NTR1 ES F THE WORLD E S.flS
J DRAGONFLY (For Ertgon 32) C6.95
J 30 BEST PROGRAMS £5,95
I I JO BEST MACHINE

CODE ROUTINES £5,05

NAME

bi&dk CepiiBii r : '■■'■•'■'

ADDRESS

POSTCODE

Post to I irwsON CONSULTANTS &DA Si Mar/* SUM WaHingiord. Qion Ox 10 OEL
* I ENCLOSE MY REMITTANCE OF

MY CREDIT CARD NUMBER IS

Make cht!fiutM^"03 cavable to KtWMO COMUllanii

f elections 10491? 3630 T

V

y

b
6

te

40
50

PEEK
60
70
K0

*^"5
lift*

100

REM main loop
L££T Q«e
GQSUB 3000
GOTO 28

GOSUtJ 200

LET H*l

LET S-0

LET SCM0S

LET fl«0

LET B«*l

LET C*PEEK <PEEK 16398+2S6*

1639y >

LET D-0

PRINT RT R,Bj "* M

LET D=L"K I NKEY** " S " ) -< 1 NKEY

IF INKEY**"© 1 * THEN LET D*8
PRINT RT fl,b r > "a. 1 '
PRINT RT fl,B> " +J

101 IF B+CX8 THEN LET 6*B+D+3l

102 IF B+D>31 THEN LET B«B-»-L>-31

110 LET B*B+D

12© IF INKEY** u M THEN LET ft*fl-
■v

121 IF INKEY**"* 11 THEN LET R-fl+
i

123 LET SC-SC-1

12 r :. IF 0I«1 THEN IF RO0 THEN L
ET fl*ft*l

i££ IF OZ«fl THEN LET R-R+l

130 PRINT RT fl,Bi

14Q IF PEEK {PEEK 163*e+256*PEE
K 16399 >CUDE "<99> w THEN GCJTU 1

006

145 IF PEEK <PEEK 16399+256*PEE
K 16399>*C0DE "(97V 1 THEN GOTO 1

000

150 IF PEEK <PEEK 16398+25£*PEE

more ovtt.

SINCLAIR USER September 1983

63

K 16399 >-COBE HJ <9h:<" THEN GOTO £

*P ' 2*9h ■ 3*sP ■■ 5*9h ' 3*97 = 3*9h ■■ -39 4

000

*9h ■ 3*99 « 4*9h i 2*97 ' 9h : 99 ' 2#9h -39

190

GOTO 70

2*97

9h)"

190

REM Print screen 1

3020

PRINT M < 4*9h >20< i $.P ■ 3*9h >S0

£90

CLS

£ 3*9h >60< S*9h >28< 9h ' isP >80£ i»P >2

^201

PRINT RT 10, 0J

0',£9hV

210

PRINT "£9h 7*»P 'S*9h'5**P : 9

3030

PRINT "<32*9h:'"

hV

3031

FOR F»! TO X

220

PR INT " £ 2*9h i 4*aP ' 4*9h i 7**P

3032

SCROLL

i 2*9h >"

3033

NEXT F

233

PRINT H 2*9h i 4**P < 3*9h ' 7**P

3034

LET K-M+l

■ 3*9h)"

3035

IF «>S THEN LET X-B

£40

PRINT "£3#9h'3*sP =2*9h'5*sP

3036

LET 0^0+1

'6*9h> ,r

3037

IF 0=10 THEN GOTO 19©

35431

PR 1 NT "< 3*9h ! 2*97 ! 4#9h « 2*99

3040

RETURN

^ 8*9h V

3060

GOTO 5

255

PR I NT u i 3*9h >20< 5*9h >S8< 7*9

4000

REM hall of f«me 3.ind hi9h

h V

hJ.9b score

256

FOR G*l+10 TU 6+10

4010

FOR J«l TO 10

£5?

PRINT RT Gil9i M <8*9h'*P«S*9

4020

IF 3>^L(J> THEN G03UB 5O00

h>"

4030

IF 5>«L<J) THEN GOTO 4200

258

NEXT G

4043

NEXT J

259

PR I NT RT 19 1 13 1 " < 9*9*1 ! 99 ' 9h

4055

CLS

.V';RT 16, 19; "<7*9h>80<9hr

4060

PRINT " top 10 Placers"

263

PRINT RT ifi,0j "< 19*9hV

4070

FOR J»l TO 10

270

FOR C»17 TO 16+4

40S0

PR 1 NT J i TRB 3 ^ LC J > ; RT J , 1 j

271

PRINT RT G j i ' r £ 32*9h 5 "

" M ;N«KJ3

272

NEXT G

4100

NEXT J

23

RETURN

4101

PRINT

999

REM landed

4102

PRINT "input fi! to see- ms

1000

CLS

true i cm*"

1001

LET S«S+S&'+20

4110

INPUT ft*

1002

GOTO 1010

4115

IF R*<>"" THEN GOTO 6000

1006

LET SC*SC+80

4120

GOTO S

1007

C-L.O

4200

CLS

1008

LET S-S+SC

4210

PRINT rr you arc- in the- toP

1010

PRINT RT 10, 19 i "SCORE*" J S

ten

P X e* *<* e 5rtt#r y cm j. i -

1026

PRINT m 11, 3 J "PRESS NEWLIN

name- r

r

E TO

CGNT PLfiV "

4220

PRINT " no 1,on9er than twe

1030

INPUT R*

Tlt'il 1

e , t-t#f , d"

1031

CLS

4230

INPUT H$tJ)

1050

GOTO

4240

IF LEN y»<J»20 THEN GOTO 4

1060

REM cra&hed

200

2000

't, i—r, -•'

4245

LET LCJ>*S

2010

PRINT RT 10, 10.1 "THE! END"

4250

GOTO 4055

^030

PRINT RT Uj6/"VUU tRRSHED"

4260

REM dim arriui

2040

PRINT RT 12, Bi "PRESS NEWLIN

4270

DIM N*< 10,20)

E H

4260

DIM LC 10}

204b

PRINT RT 13,9; ,, "iiUJRE»"/S

4290

GOTO 6000

2050

INPUT R*

4300

REM saw* Program

2060

GOTO 4000

4310

SAVE "LONER LRNDEr"

2090

REM print stzre#m 2

4320

GOTO 4260

3000

PRINT RT 10, 0J

5000

REM chan9© top ten

3010

PRINT *< 2*9h > 6*&P ' 4#9h 5*s-P

5010

FOR P«9 TO J STEP -1

'■ 3*9h ' 3*£P ' 3*9h « 2**P ■ 7*9h < 3**P ?

5020

LET L<P>L<P+1 >

*9h - 2*£P i 6*9h r 3#SP : 9h • 4**P ! ?#9H -

5030

LET N*C P+ 1 )«N*t P >

2**P

4*9h ! 7**P ! 5*9h ! 2*sP ! 9h ; 5*&P

5040

NEXT P

■ S*9h ! 3**P : 3*9h ' 4*sP ■ 9h : 3*»P ■ 4*9

5050

RETURN

h ■ 2#*P ' 9h •■ sP ■■ 2*9fi ; 3#»P ; 5*9ft ! 3**P

60G0

REM i nation*

■ 3#9h 4**P ' 9h ■■ 3#*P ' 4*9h « 2*sP > 9h !

6095

CLS

64

SINCLAIR USER September IS83

6810 PRINT M lunar l*n

rter"

6020 PRINT

6030 PRINT "CONTROLS"

6049 PRINT "S^LEFT S-RlCiHT 0**T

HRUST a-DOHAED THRUST"

eese print

6060 PRINT "THE OBJECT IS TO LAN

D ON R PHD"

fJ3?B PRINT "TO DO THIS YOU GUIDE

YOUR SHIP"
6080 PRINT """*''" WITH THE CUNTR
0L3 <5<9'0V (

6099 PRINT "THE THRUST MOVES YOU
UP AND"

6100 PRINT "STOPS YOU FROM DRIFT
I Nf" "

61 IS PRINT "IF YOU USE 5*8 AND Y

OU KEEP "

61£0 PRINT "YOUR FINGER ON THE B

UTTON YOU"

6130 PRINT "DRIFT IN THAT DIRECT

ION FASTER"

6135 PRINT "TO COME CUT OF ORBIT

PRES'S " u 9

6H0 PRINT "IF YOU WANT THESE IN
STRUCT IONS"

6150 PRINT "AGAIN WHEN THE TOP S
CORES ARE DISPLAYED TYPE " rr I " "

THIS SHORT machine code
routine can be included within
programs on a 16 or 48K Spec-
trum. It will produce 190 sounds of
varying lengths. Written by John Flu 11-
ketr of Wetherhv, West Yorkshire.

10

CLEAR

32300

2b

FOR n*

'1 TO IS'

REAL:

■3L

30

POKE '■■

i200O+rt, 3

- hi™

T n

40

DATA t

i j ^Do / 3'j t

0, 14,

1 7 j 1 Q , ,

43. £0Sj U31 j

3 j l€ j 250

,201

be

PRINT

-ENTER S

OUND

LENGTH (.

na to a©© y

60

INPUT

■y.

70

POKE S

J£0Ob,a

m

RRNDOMIL'E U5R

320&1

6160 PRINT "PRESS NEW LINE TO PL

AY"

6170 INPUT A*

£180 CLS

SVM PRINT "do you want an orbit

SISS PRINT "enter * or n"

6200 INPUT 0*

6310 IF 0**"Y" THEN LET 01- J.

6220 IF 0*^ W K" THEN LET 01-0

£23® IF 0*«***Y" OR 0*- M N" THEN LO

TO 5

6240 GOTO 618£

SINCLAIR USER September 1&83

65

IEAD SMILER around the screen with the usual
cursor keys, He must avoid the trees and tat the
-J green squares. Once he has eaten four green
squares he becomes supercharged and can eat as many
trees as pnssibk until his time (marked on the top right)
runs out. If Smiler cats the inverse c while super-
charged you gain ID bonus points for every unit of time
remaining.

A game for the 16K Spectrum by Red vers St ringer »
Margate, Kent,

10 BORDER 3

59 LET L-ti

60 GO SUB S080

70 FOR n«l TO VB LET fl-INT (R
ND*6>' PRINT J INK FIj TUB B*ni M bS
MILERb' 1 ' NEXT r,

90 BEEP .2.7' BEEP .15,7' BEEP

,l#8' BEEP -1,7= BEEP .1,12' BE

EP .1,11' SEEP .1*9' BEEP . 3* ?

REEP .2,5= BEEP ,1*5' BEEP .2,4=

BEEP .1*4*' BEEP .1.2' 'BEEP . 1,

9 ! BEEP - 1 , 2 c BEEP .3*4

3*5 PAUSE 200' CLS
100 LET V<3 LET S*®' LET J*S'
LET H"l& LET Y-1S

129 PRINT RT 0,t3j"b to "

125 LET G*INT < RND*18>K2 ■ LET H
-INT (RND*30>+1

130 FOR fl»I TO 6' PRINT RT INT
(RND*1B)+2,INT <RND*30>+I; INK 4
>«*"' NEXT Ri PAUSE 30

135 LET R=*Q' LET J-0 LET 2«90

137 GO SUB 6000

140 PRINT RT rNT <RHD*ie >+2, INT

CRHD*30 5+ii INK 2jH C "

145 PRINT AT H,Y; " "

150 IF R-10 THEN PRINT RT G,H; M

"i LET OINT CRND#17>*3' LET H-
INT < RNf>*29 H2 ' LET R*-0

165 IF J<4(J0 THEN PRINT RT K/Yj
"b"

167 PRINT RT X#Yj " "

170 LET H*X*K INKEY**»"6" >-< INKEY
*«"?" H<X<2>-(X>£0>

66

SINQ.A1R t-'SER September t$8)

180 LET Y«Y+< INKEY*="0 rr >-<. INKEY
*«"5" )+< Y<1 >-<Y>30)

190 IF 2<™B3 THEN GO TO 1000

200 IF J«400 THEN BEEP .2,14 ; B
EEP .2*12' BEEP . 2>11' BEEP .2,9
i BEEP *Bj?- GO TO 1O00

220 IF RTTR <X,Y>»50 THEN GO TO

7000

230 IF RTTR <M,V>»60 THEN LET S
-S4100; LET J-J+10O
250 PRINT RT 8,0; "'SCOPE* ";S

260 PRINT RT G * H ; " t<?) J1

390 IF J<4@0 RND K«G RND Y-H TH

EN LET 1^10 = GO TO 7000

320 IF J>«490 AND X~G RND Y-H T
HEN PRINT fiT lv 10.1 "BONUS TIME"'
FOR P*18 TO 20 < BEEP . 1,F< NEXT
F> GO TO 300

iSOO IF J<400 THEN PRINT RT H*Yi
"b"

620 LET R-R+l

700 IF J>«400 THEN PRINT* AT X/Y
i "fa"

SOO GO TO 140

LET Z«Z~1 GO 'SUB S6O0
510 IF £<*■! THEN PRINT RT 1,10;
" ■ LET R**l@« GO TO 1

9£0 LET S~3+I0

930 PRINT RT 0,0; "SCORE™ "jS
340 GO TO 900
1000 IF RTTR CK,V>*Se THEN GO TO

1010 LET Z*Z-I< GO SUB 9600

1020 IF Z«9 THEN GO TO 130
1030 GO TO 240

2000 LET Z*2-l« LET S-S+20 ' GO S

2010 IF Z^0 THEN GO TO 130
2020 GO TO 240

5909 FOR F*0 TO ?■ READ X' POKE
USR H R"+F,X' NEXT F

5100 DRTR BIN O00H00O.0IN 00111
100, BIN OinillO.BIN 1110O1U. BI
N lllOOlll.BIN 01111110, BIN 0011

UOO.BIN 00011000

■3200 FOR F^O TO 7^ RERD K< POKE

USR ,r B"+F,X ! NEXT F

5300 DRTR BIN 0ll00il0,BIH 0110
0110, BIN 0,BIN 0,B1N 11000011,61

N 01 1091 10, BIN 001 11 100, BIN 0001

1000

3400 FGP F^O TO ?■■ RERD X- POKE

USR ,I G ,, +F#X' NEXT F

5500 DRTR BIN 0OOU000.BIN S0111

100, BIN 01111110, BIN lUllllliBI

N lllUil i*BIN 000 11O00, BIN 0001

1000, BIN 00111100

5600 FOP? F=*0 TO ?■■ HERD «' POKE

USR "L>"+F,K ! NEXT F

5700 DRTR BIN l@ei.eei0, BIN 01018

100, BIN 0,BIH 11000110, BIN 0,BIN

01O101D0, BIN 10010010, BIN
6000 RETURN
7000 PRINT AT X, Y; "d"
7100 BEEP .5*4' BEEP .5.6' BEEP
.25,7= BEEP .25,6'' BEEP .5,4
7200 LET V«V-1

7205 IF V-2 THEN PRINT RT 0,13;"
b

7210 IF V^0 THEN GG TO 730B
7215 IF V»l THEN PRINT RT 9,13j"

7220 GO TO 140

7400 IF S>L THEN LET L-3

7500 CLS ■ PRINT RT 3,2; "YOUR SO

ORE " j S j RT 5 , 2 i " H I SCORE " i L ; R
T 17,0; "DO YOU \AlSH TO PLRY RGfit
N <N^Y:<"' PRINT RT 9,3j"GflHE OVE
R">RT lO.Si; "CRME OVER"

7515 PAUSE.' 30

7517 IF INKEY** 1 "a" THEN GLS ' GO

TO 100
7320 IF INKEY^-'Y" THEN CLS '■ GO

TO 108
7530 IF JNKEY*""N a THEN CL3 > PR
INT RT 10, 13 J "GOOD BYE" ' STOP

7540 IF INKEY** "n" THEN CL^ - PR
INT RT 10, 13; "GOOD BYE" : STOP
7550 GO TO 7517

B50O LET Q-0

2528 PLOT 163+0,175 ORRW 6,-7

0530 LET R-INT CRNt>*30>« BEEP

m* r

B540 LET Q^Q+1

8560 IF 0^90 THEN RETURN
0590 GO TO 0520

O

8600 PLOT I 63+2 , 175
;0,-6- RETURN

DRRW OVER 1

SINCLAIR USER Stptem&ft 1$83

W

SHARK CASTLE is being attacked by a group of
marauding dragons. Each time a dragon hits the
castle the crack in its wall will grow larger. Try to
shoot down all the dragons before they can destroy your
home. Move left with '0\ right with T" and fire with
'A'.

Created for the 16K Spectrum by Shaun Ward of
Plymouth, Devon.

16 LET z*23« LET *c*8' LET »h-

G " LET lv<3

20 GO SUB 55028' GO TO 1000
30 FOE ns«14 TO 2 STEP ~1 < LET

***+l< PRINT INK ijflT x,<J-l;" RS

40 PRINT INK i;RT n, lr+1 J " f " >R
T n*i/lr**li* (i = BEEP ,004, n' BEE
P ■ 005, rt*S

50 IF «>i£ THEN LET v-a* PR TNT

AT x,16; LET z*z+i ■ FftlHT

RT 12*21" " ■■ IF z*31 THEN CO TO
250
55 IF SCREEN* < n-J. , Ir+1 X >" "
THEN GO TO 170

ffl NEXT n« PRINT RT 2,Ii*+1j" M
70 RETURN

80 FOR n*l9 TO 21* PRINT RT 16
tin" ") INK 5j PAPER IjRT n, 1
r,i"E">RT n-I,lr;" ri ' BEEP .5,-yv
NEXT n
90 LET z*23 ' CLS ■ OVER 1 « BR I
GHT 1' FOR n«*9 TO 21= PAPER < RND
#5+1 >< PRINT RT n,0,, * BEEP .01,
n< NEXT in

190 PRINT INK 9jRT 7,12j"SCGRE'
";RT 9, 12 j "LIVES i " j RT 11. 12; "SHE
ETS'";flT 7,18;scjRT 9,ie/tujRT 1
1 t 19;sh

110 OVER ! BRIGHT FOR m-1 T
509 f NEXT n ! RETURN

120 FOR «■! TO IS- LET y«n+l ' P
PINT INK i;RT KiM-l-j " RB "
13© IF «>1€ THEN LET u*@' PRINT
RT x, 16j "

170 PRINT INK i ; RT x,«-1j "***"'

BEEP , 1,X' PRINT INK i;RT x-*l,a

; "*" ■ BEEP . 1,-X* PRINT RT x,a-l

j " ";RT jc-l/M*" " ■ LET.w-B' LE

T «?**£+ 10
180 PRINT AT x+l/lr+1.-;" "
196 LET x-x-1' GO TO 3040

£00 PRINT RT 16,lr+i>" *» < FOR n
■ 19 TO 21= PRINT PRPER 1 j RT r»,lr
j INK 6j h F";RT n-l,lrj PRPER 1 > |J

" ' BEEP .5, -TV NEXT TV PRINT PR
PER 1;RT 21, In" "

230 IF lv-0 THEN GO TO

£40 RETURN

250 FOR rt«19 TO 22 ■ BEEP .3,tv
PRINT RT 17, n; INK i;' r F"' NEWT n

270 LET a*- "YOUR CRSTLE HRS HRD

IT"' FOR n-1 TO LEN J.*' PRINT 1
NK <RND*5+1 >/RT 16,ti;**Cti TO n ) ■■

BEEP . l,fl« NEXT ti

280 LET ly^lv-1' LET sh«sh+l ! G
SUB 90= LET z=23* GO TO 2040
1900 LET w*144

1010 FOR n*0 TO ?■■ RERD a< POKE
USR <CHR» *>+*,*< NEXT ti > LET x-
x+1

1020 IF x>149 THEN GO TO 2040
1030 GO TO 1010

1040 DRTR 64,229,255,127,63,96,6
4,160

1060 DRTR 16,104,252,214,139,196
,32,60

1079 DRTR 28,28,8,252,10,13,10,2
4

2010 DRTR 255,129,153,157,235,23
5 I*!55 ""'55

2020 DRTR 24,24,31,48,48,72,136,

204

2030 DRTR 235, 123, 129, 129, 129, 12

9 1^9 255

2040 IF W<1 THEN GO TO 4050

2045 LET *b«*h* 1 : PRPER O ■ BQRDE

R 0= CLS

£060 FOR yi-17 TO 2t = PRINT INK 3

;RT «,0;"FFFFFFFFFFFFFFFFFFF" ■ B

EEP ,01,'rv NEXT rt

2070 FOR -fi-*17 TO 21= PRINT INK 3

;RT ft, 23 J "FFFFFFFFF" = BEEP .01, n

- NEXT n

68

SINCLAIR USER Stptrxrber 1983

2080 FOR a*24 TO 31 ■ FUR r«-16 TO
7 STEP -1 PRINT INK 5;AT n,a;"
F' H < NEttT n« BEEP .81,*= NEXT *. •■
PRINT AT 6,23; INK 5; "FFFFFFFFF"
; AT 5, 22 ; " FFFFFFFFFF "
2090 PRINT INK SjAT 4,21; "F F F
F F F"jflT 3,21.; INK £; " ";AT 2,2
1;" "j'fi'T 2,20; INK 2; PRPER 5j F
LRSH 1 ; "D"

300a for n-ie to si ? print ink i

jflT n,19j"<4*i*f»>"' BEEP ,5,rt< N

EHT *

3010 PRINT INK <RND*5+1); PAPER

9i FLASH 1;AT 0,0J "<C 96 ! 93 ' 96 ■ 93 ■

96) KILLER-SHARK CASTLE Ci96>93-

196 '93' 196 >"

3320 LET y-i

3030 LET Lr-4

3040 LET x-INT C RND*9+2 V LET i*

INT <RND#5+1 >

3045 IF z>30 THEN GO TO 253

3046 PRINT HT 12, ZJ " "

3050 LET Ir-lr+CIN 57342=254 OR

lr<l >-< IN 57342*253)

3060 IF IrMS THEN LET lvlv-l '

GO SUB 60' CO TO 2040

3070 PRINT iNKfSiflT 16, Iri " E »

3080 PRINT INK ijRT x,wj INK 5i"

m "i 8EEP . 062,x
3090 LET m*«+1

4080 IF *>16 THEN LET **Q< LET 2
*z+l^ PRINT RT k,16j" " ! CO TO

3040
4010 IF IN 65022=*254 THEN GO SUB
.30

4920 PRINT PRPER i; INK 9jAT 17,
0> "SCORE '"jsc
4940 GO TO 3050
4050 BORDER <RNDv35« PRPER 0^ CL

S

4060 PRINT RT 0,0 j INK RND*5; "SC
ORE' "j&cjRT 0, 13 i "HIGH-SCORE •■ "jfn

4079 PRINT RT IS, 7; FLASH 1; INK

RND#3; PRPER 3; "ANOTHER GO? < Y^
W>"

4030 IF INKEY^'y" THEN LET sh^O
' LET *c*0« LET Iv*3 ! GO TO 2045
4090 TF INKEY*^"r< H ' THEN RANDOM 1 2
E USR

5O00 BEEP .01, INT <RNO*30>
5$i0 GO TO 4000
5020 PRPER 1 BORDER 1 OLS
5030 PRINT FLASH 1; INK 2; PAPER

5;AT 0,0;"C32*i95>";AT 21,0J H O
2*95 V

5940 FOR n-1 TO 20^ PRINT FLASH
1; INK 2; PAPER 0;RT n,0; **< 93 > H ;
RT n,31; "< i93>" - BEEP .01,n' NEW
T n
5650 PRINT FLASH ll INK 3; PRPER

6 j AT 2,4; "WELCOME TO SHARK CAST
LE. "

5060 PRINT INK 3jAT 4,1; "YOU MUS
T STOP THE DRAGONS FROM" ) AT 5,1;

INK 2 i "DESTROYING YOUR CASTLES,
">RT 6,1 J INK 3; "YOU DO THIS BY
FIRING RT THEM."; AT 7,1; INK 4;"
IF YOU FALL IN THE MOAT, OR ALL";
RT 8,1 ; INK 5j"Y0UR BRICKS RRE T
RKEN THEN YOU"; AT 9,1; INK 6; FL
ASH 1; "LOSE A LIFE. "
5i"*7i? PRINT INK 0; PAPER 5; AT 11,
10; FLASH 1 ; "CONTROLS -" ; AT 13 , 5
;'<LEFT-0";AT 13, 19; "RIGHT-P" i AT
15, 12; "FIRE^A"
508G PRINT INK 2; PAPER 6.; FLASH

1;RT 1B,£. IMPRESS ENTER TO PLAY"
509S BEEP .01, INT <RND*19>
50SG IF INKEYtKCHR* 13) THEN RE
TURN

5100 BEEP .01, INT <RND*48)
5110 GO TO 50&5

SINCLAIR USER September l&SJ

6$

PATIENCE

THIRTY-FIVE CARDS are ar-
ranged in seven rows of five on
the left of the screen. On the
right is an upturned card and a pile of
cards face down. The aim is to finish
with the 35 cards piled on the right.

A card at the bottom of a row may be
removed and placed on the right by
pressing the number of its row, so long
as it is next in number to the card on the
right. Thus a five or a seven may be
placed on a sis, a queen on a king, or a
two on an ace. If no other move h
possible, another of the cards on the
right can be upturned by pressing "S".
Patience was. written for the I6K
Spectrum by Andrew Price of West
Bromwich, West Midlands.

A

^•^Mk

1 GO SUB 90#fl

3 BORDER Bi PflPER

INK 0^

LS

4 PRINT RT 3,12j PRPER Si INK
2; "PfiTIENCE" ■ LET &**&-■ LET .!$-"
R2:J456789TJGK"

10 8EEP .05,0" BEEP „05,1O : BE
EP .85,8

13 LET bS^'abcdcbad"
15 DIF-1 a*<7Q4>: DIM e<4,13>< D
IM n<7>' LET z«l?< DIM v<17>> Dr
M P<7,5>> DIM q^7,S5' DIM wU7)

45 FOR i*32 TO 704 STEP 32' LE
T *«C i -3 1 TO i >^ " < 32* i &P > " - NEX 1 '
].

eo FOR i»l TO
62 BEEP ,85,©
65 GO SUB le3

76 LET vC l >=s

17

LET uK i >-t ■ LET

»*<32#i+34 TO 32*i +£©>> M C 3*sP < 1

3**P

i*P ■ 3**P : iftp

*p '3#sP ! isP

*P ■ isP « 3*sP ■ isP ■ 3*sr )" ■ NEXT l

33 FUR i*4 TO 13 STEP 3« LET s.
•<3£*l+2 TO 32*1+28 >»"< 3*193 < i»F
■ 3*193 ! isP ^3*i93' isP '3*193 ! isP 3
*i93 ' i Sp * 3* 1 93 ! i £P ! 3* 193 > " : NEXT

i

\m FOR i=2tf6 TO 414 STEP 32^ L
ET ft«f. l TO i+2>-" »i LET **< i+
286 fa 1+299 >*"< 3*96 >" ' NEXT i

I as FOR i-l TO

130 FOR i«-l TO

7

132 8EEP ,05,2
135 GO SUB 1*3
140 LET p< i, j >

LET Kiw >-t

LET **< J*96 + 1 #4-34 ?-!*< -H l ^ J > >
155 LET ft*< j*96'+ 1*4-2 >*b*<P<. 1; J

169 NEXT j

162 BEEP »05/4

179 LET *i< 1*4+639 >CHR* (48+i)
i LET **<57e<H*4>*a»<3<i,5>>' LE
T %$(. 544+ 1 *4 >-fo*< P< i , 5 5 5

190 NEWT l

135 LET s*<255?»"F" ' LET UK 543

70

SINCLAIR USER Stpumkttttt

3m LET j-w<2>
385 LET b-vCz)
310 LET ***-!
315 LET »«t £36 >»&*< jl )
320 LET *« 416 >-**•< J. >' LET a*C3
i e >b*< b > ' let s$k 3e4 >-b*< b >

355 PRINT AT 0,0; s*
361 PRINT FIT 19.30J INK 7; PfiPE
R 0jz
365 LET z*«INKEY«
370 IF i**"*" THEN GO TO £00

375 IF CODE ^*>CODE "

OR CODE

2«<CQDE "1" THEN GO TO 365

380 LET y~VRL z*

385 IF My>9 THEN GO TO £e3

390 1 F RB$ < 3< * j if* y > >- a .X > 1 THE
N CO TO 2*3

3:35 PRINT AT £1.13; PRPER 0; IN
K Si PRPER 2; "-.OK.." BEEP .03,
10

400 FOR i^n<Cy >#2»1 TO tt<*>*3+3

405 LET fc«i*32+w#4-2

410 LET *$<<9 TO 9+2 W'< 3* i^P >" '

NEXT i

420 LET *=■?<. v,n<"rf >>

425 LET b«F <. y > yk u > >

430 LET rK* >•*?** >-l

435 IF r<<y>=0 THEN GO TO 315

448 FOR t<*l*<¥>#3+l TO n<*>*3"+3

45G LET 9»i*32+w*4-2

455 LET £*<9 TO 9+2 >«""

460 NEXT i

465 LET sSK 96*rK y >+96+y*4 >*JL<K ^

< y j n< y > > >

470 LET S*< S£#T1< y )+64+y*4 >«*fc>#< P

< y .- n< y > > '?

475 GO TO 315

6O0 IF 2>0 THEN PRINT RT 21,13.:

INK 6; PRPER 2jV*0K„* fT < BEEP .
05, IS

602 IF Z'r-U THEN GO TO 300

605 LET e-~l

610 GO TO £e3

cjoq GTOP
1300 LET s^INT CRND#4+0
10 10 LET t'lNT {RNtWl.3+1 >

1O20 IF C<*,fc>*l THEN GO TO 1*3

1O30 LET cCs.^.)^],

1040 RETURN

2000 LET o*@

2018 FOR l-l TO 7

£020 LET o-o+yk i )

2838 NEXT i

£040 IF o-0 THEN GO TO 2100

2050 IF z~0 RND ft«l THEN GO TO 2

070

2069 GO TO 350

2070 'PRINT RT IS * 12 i PRPER 2; IN
K 7 } " HARD L LICK " ; HT 17,7; 5. NK 7 1

PRPER Si "You lost by " ;o;' r card

20BO IF ©<>1 THEN PRINT INK 7; P

flPER 2; H 's"

2090 PAUSE 0' PAUSE 150

2092 CLS

3093 RUN

2 1 O0 PR INT HT 1 5 > 1 £ .; PRPER 2 ; I N

K 6; FLASH U"WELL DONE rl ,;pT 17,

0j INK 6: PRPER 2," You won uith

" ; z; " stock card" s

2110 IP zOl THEN PRINT INK 6; P

RPER 2; FLASH 1j " s"

3120 PRINT INK 6; PRPER 2; PLASH

1/" left"
2135 FOR m*l TO 2' FOR tt»3 TO 7'

BEEP P 05,rv BORDER n ■ BEEP -05,
-r,- NEXT ff = NEXT m
2130 00 TO 2&9Q

8999 STOP

9000 FOR &~USR ".3. H TO USR "d"+7
9010 READ user ■ POKE a,n*.er
902O NEXT a

9030 DP TR 1 6 , 56 , 1 24 , 254 , 254 , 254 ,

84/16

9040 DATA 1 € , 56 , 1 24 , 254 , 254 , i ZA ,

56, 16

9050 L>RTfl 102,231 , 255, 255, 255 , 12

6.. 60, 24

9860 DR TR 24 , 60 , 1. 26 .. 255 , 2 55 , 1 26 ,

91O0 RETURN

9900 '3RVE "PATIENCE" LINE 1

sn

10

SINCLAIR USER September 1983

71

E^ NTER the principal of the mort-
gage you wish to calculate the
interest rate, and the number of
years ovtr which it must be repaid. The
computer will then calculate your
monthly repayments for that time, the
amount of money remaining to be re-
paid each month, and will draw a graph
of payments,

Mortgage was written for the 48K
Speartim by D Barton of Keighley,
West Yorkshire.

1 BORDER i ;

PflPEB i-- INK 7' C

2. POKE 23639 * 10

10 PRINT RT

G* 12 J "MENU" ' PRINT

2Q PRINT RT

8 > 5 .= " 1 . I nP u t van A

hies"

39 PRINT FIT

l@4 5;"2.Mort9A9wS' L:

j .Icu.l.afcio'fi 11

40 PRINT RT

12,5; "3.rirj.Rh Of R

e»utfcs w

o0 PRINT RT

t r i, 2; " InPut Code N

umber To Comt:

Litue M . ; flT 16/ 5 j "<QP l

must be completed be

fore GP$2 arid

3>"

m INPUT P*

70 IF P«<>"3

L ,r RND P»<>"2" AND

P$O m S" THEN CO TD 60

80 CLS

72

SINCLAIR USER %emte ffiSJ

30 IF p***"! 11 THEN GO TO 120
10ft IF P*^"2 rr THEN GO TO £$0
110 IF P** tt 3 11 THEN GO TO 550
i2ig print RT 6* Si "Enter PrlnciP

130 INPUT * PRINT RT 7,3; **&.">*
140 PRINT RT 9i Si "Enter- current.
Interest rate ■ n

1 50 I NPUT e = PR I NT RT 1 * 3 J e i " ';

168 PRINT HT 12, 2 j "Enter numkser

of a ear*

ITS INPUT n< PRINT RT t3,3jrrJ w ,

years"
1 86 LET h*< ( e^ t 00 >+ 1 v "^
190 LET J*K 1/h >-l
£09 LET k-( J/ 1 ' ™e/100 > '•■''■3.
210 LET eK 1/k V12
226 LET b«a#C.e^l00>
230 LET x»a+b

240 PRUSE 50- CLS ' CO TO 10
250 PRINT 1( — ™— — — —-

, r f

£68 PRINT " Year 1" ! PRINT

279 PRINT TAB 8; "Balance - £. " j
TAB 25~LEN 3TR4 aja

29S PRINT TAB 8j " Interest- a. "i
TRB 25-LEN STR* I NT b;b

290 PRINT TRB 18j " "

300 PRINT TRB 1 8 J "£ w J TAB 2"5-LE
N STR* INT x;x

310 PRINT

320 FOR 9*1 TO n

330 FOR »»i TO 12

349 IF INKEYflO 11 " THEN PRUSE 30

339 PRINT TRB 6-LEN STR* tinmTft
B 8i"£ rt JlNT <C*1B0 V1O0JTRB 13)
■»•* "jTRB 2'5-LEN STR* INT <K-c)Jl
NT <<x-c>*U00 V100

360 LET x«x~C

370 IF k<~8 THEN INPUT P*- CLS
i PRUSE 30' CO TO 10

389 NEXT m

390 LET z=Ce^1.O0>:*:x
400 LET y^x+Z

410 PRINT

4£0 PRINT " ■ ™ —

430 PRINT "

440 PRINT " Year w J$M>t" PRINT
450 PRINT TRB Bi "Balance - C M J
TRB 2S-LEN STR* INT x; INT Ck*1Q0

viae

460 PRINT TRB 8) "Interest- € "J
TRB 25-LEN STR* INT z)INT <z*180
VI 00

470 PRINT TRB iBi" ■ ~"

430 PRINT TRB 18> "-£ ";TRS 3^-LE
N STR* INT mjINT <m#190V100
490 PRINT
5O0 LET K.«M
510 NEXT 9
52© CLS
530 GO TO 18
540 REM SraPr,
350 DIM y*<20
360 LET y**" MM! Pound* M \\ M

! I "

S70 FOR 1-1 TO LEN y*
5S0 PRINT AT i/0jw*< i )

599 NEXT i

600 PRINT RT 21,1*"'

Years "

610 LET b-**<e/100ri

620 LET l-S

630 LET x»a+b

640 LET z»x*(l+(*/109))

65S IF z<8000 THEN LET 1-46

660 IF z>*-Q000 RHD z< 14000 THEN

LET **80

670 IF z>*» 14000 RND z< 20000 THE
N LET ^"120

660 IF Z>- 20000 RND T< 26000 THE
N LET q*l!30

€30 IF z>-26000 RND z< 32000 THE
N LET q-lB5

700 FDR 9-i TO n

710 FOR m-i TO 12

720 IF INKEYX. >"" THEN PRUSE 30

739 LET i*l+,75

740 PRINT RT 1,4; "^ " J TRB 11, -LE
N STR* INT x)INT <x#100VlQ0

750 PLOT l,x/q

760 LET x-x-c

770 IF x<-0 THEN CO TO 030

780 NEMT m

790 LET z-Ce/100?*x

000 LET u-k+*

810 LET *mi

820 NEXT 9

©30 PRINT RT 1.4;"
ii

040 PRINT RT 4, 16i "Y«*r*'";n;RT
5, 17) "Loan 1 ^"jajRT 6, I8>" Int ' Hl i

ejflT 6,24; "*"
830 INPUT "Copy? Y/N "jPI
860 IF ptVY 11 OR P**"y" THEN PR

INT RT 1,4)"
670 IF P*-"Y" OR p*-"y" THEN CO

PY
880 CLS
090 GO TO 10

SINCLAIR USER September 1B83

n

THIRTY

WHEN START? is displayed
enter M if you wish to play
first or Y if you would prefer
the computer to start. A set of counters
will then be displayed, four of each
number from one to six. You and the
computer take turns in removing a
number to add to the total. The winner
is the player who brings the total to 31.
Written for the 16K ZX-S1 by J. H.

Entwistle
shire.

of Cheltenham, Gloucester-

8

CLS

170

FOR N=l TO 4

S

PRINT "STRRT?"

190

IF 0<M-1/M>»9 THEN GOTO 220

10

INPUT R*

198

NEXT N

U

LET R*31

200

LET M»M~1

12

LET M-7

210

GOTO 170

13

OIM Dt6,4>

228

LET C*=R-M*INT < R/M >

14

LET T«@

230

IF R^M=INT <R^M) THEN LET

G

lb

CLS

-1+INT <RND*<M~! >>

19

FOR N»l TO 6

240

FOR N™1 TO 4

£0

print mxtti

250

IF EXGsN><«@ THEN GOTO 300

30

NEXT N

260

NEXT N

35

PRINT ffT 9,0; "TARGET- 31"

270

LET G*1 + INT <RND*<h1-l >>

4a

IF A*< i )*"Y" THEN GOTO 220

260

GOTO 240

100

PRINT AT 18, J "NUMBER?"

300

PRINT RT C-1/N-Ij M . "

110

INPUT N

310

LET R-R-G

in

LET N»INT fiBS N

315

PRINT RT 10,0; "TUTRL-";31-

-P

112

IF NOT N OR N>M-i THEN GOTO

316

IF R~0 THEN GOTO 350

110

317

IF R<.0 THEN GOTO 340

113

PRINT RT 19,0; "

320

LET DtG,N>*l

120

FOR ft*i JO 4

330

GOTO 100

130

IF D<N,R>=0 THEN GOTO 145

340

LET T*l

140

NEXT R

350

IF T-l THEN PRINT RT 12.0.

II

145

PRINT AT N-l,fl-l.« "„'•

YOU WIN. "

130

LET DtN.R^l

360

IF T=0 THEN PRINT RT 1,2,0,

n

160

LET R*R-N

I WIN."

164

PRINT RT 9,0; "TARGET- 31"

37©

PRINT "RGRIN?"

165

PRINT m 10,0j "T0TRL^"j31-R

380

INPUT R*

166

IF R-=@ THEN GOTO 340

39%

IF A1K 1 >«*Y« THEN RUN

167

IF R<9 THEN GOTO 350

me

STOP

74

SINCLAIR USER September i983

* S YOU MOVH down the screen,
L\ steering with the usual cursor
X A keys, a maze moves up towards
you. How far can you move through it
before your way is blocked or you crash
into a wall?

Maze was written for [he IK ZX-8I
by C Hopley of Liverpool.

5

REM "MFlZE"

ta

LET X«COD£ "<95> w

15

LET S-NPT X

20

LET Y*S

25

LET D-CODE "COS H

30

LET E-CODE " >"

40
E
50

IF IHKEY*i""6 M THEN GOSUB D-

GOSUB D

60

LET Y*Y+^ INKEY^-^B" AND V<E

;:'-< INKEYS*"5" AND Y>NQT X)

80

rjQTO D^X

U?0

LET 8*S+C0D€ "<9l >"

191

PRINT AT CODE "-'SHUT Xi "< 1

6*isP > H

192

GOSUB D-X

194

PRINT FIT CODE M «'SRND*E; "< 1

sP ) M i

AT CODE "<",RND*Ej" w >flT CD

DE "<",RND*E; " "

199

SCROLL

200

PRINT AT X,Yj

2m

IF PEEK <PEEK 1639B+PEEK 16

39£WfVfiL "256">»CUDE "< l*P > M THEN

GOTO CODE ">*"

210
213

PRINT FIT HjVi"<i*>*lBT X,Yj

RETURN

228

PRINT J Xi*>SCORE"")S-CODE N

C4ft?

r

SINCLAIR USER September WW

75

NUMEROUS tele phone calls lo
Sinclair User have made it
clear that many owners of 4SK
Speetrums are interested in re-defming
their character sets. This program by
Darren Sargent of Plaistow, London
enables you to do thai. There are sever-
al options, including changing one ex-
isting character into another, and re-
designing a character.

When re-designing a character by the
use of binary numbers^ BIN must be
entered as a keyword and not typed-in
Setter by letter.

10 PRINT TAB Hi "CHARACTER"

6b PRINT RT i9/0J n <Us« oP t ton

2& PRINT ""Thi* Pro9ran will

5 ■' im tal ly ■'"

d«si9n the" ' "character set of' th

79 IP XNKEY** rt,i THEW 03 TU 70

e SPECTRUM- '""Because of thift-j«n

7"5 LET a**»INKEY*

y characters. PRINTed uii 11 zPPe

60 BEEP .1/23

s.r «ft you "'"have r*-d#* iflned th

90 IF **>"€" OR a$<"i n THEN UU

9ffi*

TU 7@

39 PRINT "Press ENTEfl to conti

95 BEEP .2/VRL a**2

nue,. . "

96 CLS

40 IF INKEY9&OCHR* 13 THEN GO

97 go tu (vriL ai*iee)

TU 46

100 PRINT "Which character do y

5S CLS ' PRINT "TAB 13; "MENU'

ou wish to "'"redesign ?*'

— " :

10S INPUT c*' IF C*< M " OR C*>"

68 PRINT "i>Rede*i9n a charact

ft" THEN GO TO 103

er"' lf £>Set a character to it's- u

197 LET x*S*<CO0E c»-32>

sua L " ' "Sine I a ir form" J w 3 >Chan9e

110 CLS '■ PRINT AT Q, Q; "Redesi9

a. character into " J "another Jr ' "4 }

nin9 '"jc*;"'" 1 FOR c«0 TU 7

Go back to Sinclair charactersan

12Q PRINT RT 2,0^'Enttfr data fo

d exit frort pro9r*« lw,t S>S#t up a

r row " i c+1 ' "< You can use the fu.

*#r*- ctef i ried chars - "' " 6 >Pr i nt out

net i on 'BIN' >"

charcter set"

130 INPUT d = IF d>'S53 OR eKQ TH

n

SINCLAIR USER V^^mfer JSflJ

EN GO TO 120

148 POKE 31831+c+x.cT NEXT c= G
TO 700

260 PRINT RT 0, Qj "Which ch*r*ct
er do mou wish to"' "return to mo
ri*JLlifc¥? w < INPUT c«- IF <=•>"«"
R c*<" " THEN GO TO 200

205 LET x*S#CCODE c*-3£ >

210 PRINT AT 11, 16; cS

220 FOR c=0 TO 7' POKE 31831+C*
x,PEEK < ISSIS+c+x) 1 NEXT e« GO T
730

300 PRINT "Which chiricter- do w
ou wi*h to "' "chinQ*?";

310 INPUT cM* IF c*<" " OR c*>"
ffl" THEN GO TO 318

320 PRINT " "Wh-J.t do you, uish t
rj chj.n9» ' w ;c*j'" into?"

330 INPUT r.9- IF n*>"G" OR t**<"

M THEN GO TO 330

340 ^ET x»a*<: CODE c*-32 3 ■ LET v
-8*<C0DE nt-32}

350 FOR c*0 TO 7: POKE 31831 +c+
x,PEEK < L5G16+C+V >' NEXT c 1 GO T

7013

40© POKE £3606,0= POKE 23607,- SO

1 PRINT TAB 12i FLASH 1 ,: "GoOdbw*
"• 3T0P

580 CLEAR 31574! print RT 0,0;

CLEAR THE hurdles in front of you by pressing
"J" 10 jump, Remember that jumping is tiring SO
that the longer and more frequent your jumps,
the smaller your chance of clearing ihc next hurdle.
Your scone will be given when you ft il to iumpahurdlti. For
rh? 16K ZX-81 by Bruce Harkinsof Stewjmon, Ayrshire.

15

LET

T-0

23

CLS

21

LET

Z«*0

25

LET

fl*3

28

LET

S*0

30

FOR

N*»Q

TO

31

40

PRINT RT

16

,Nj

"Cflf >"

50

NEXT N

FLRSH 1j "Nothing's Uron9!l"

510 FOR c^Q TO 767 ! POKE 31831+
cPEEK CIS616+C)' NEXT c LET *•
31831-336= LET b^INT Ca^256>< LE
T c-A-b*256» POKE 2360€,c« POKE
23687 ,fc' GO TO 700

600 FOR c*32 TO 255- PRINT CHR*

c; ! NEXT e 1 GO TO 700

700 PRINT RT 1 JJjfil j "Prffs*. arw

key to return to
GO TO 50

Menu."' PRUSE 8

60 G03U8 300

70 PRINT RT R,Bj " H

75 LET B-&M

77 LET R-R+-3

80 IF 8*3J THEN GOTO

85 IF INKEY*«"J" THEN G03UB 40

20

87

ee

95
100
399*
105
110
200
210

220

300

305
310
320

410
420
430
440

IF (H"& THEN LET R*9
IF fl>*»9 THEN LET R«9
PRINT RT R,Bj "C i>>"
PRINT RT R,B+1j
IF PEEK {PEEK I6330+PEEK
256>-»i26 THEN GOTO 2O0
LET T-»T+1
GOTO 70
PRINT T
PAUSE 30
GOTO 1

FOR D*l TO 3
LET F^INT CRNO*27>+5
PRINT RT 9,Fi w < isP > M
NEXT D
RETURN
LET 2*2+1

IF 2>=10 THEN RETURN
LET R»fl-l
RETURN

16

SINCLAIR USER Sg>K*A#r 1M3

77

yy-^~^ 1 LET S--1

3 LET 3*S+PI/PI

€ CL3

10 lf:t ft- INT CRND*ltn

20 LET OPI^PI+13

30 FOR G**PI/PI TO PI /PI +9

40 PRINT RT G+10, 15j"< i->"

50 NEXT G

51 PRINT RT 5,0j "< i*P 30*96' i.£

p .'

32 PRINT AT 20, R; "< isP V

53 PR I NT RT 20 , C i " <. fl J > N J FIT

r> , ii ii

20,

Li t

54 IF INKEY*- !l 0" THEN GOTO

80

GQ LET C-OK INKEY#» H e H AMD

C<3

9XINKE¥»*"5" RHD C>16>

70 GUTQ S3

ee FOR D«C TD C-15 STEP -1

98 PRINT RT e,D* "<■**«»*>"

100 HEJfT D

110 PRINT RT 6/D-2*"

120 PRINT RT 20, D; H (9A >"

120~PR1NT RT 20,Dj M t9a>"

130 IF D»fl THEN GUTQ 3

140 PRINT 3

, ;

^1

..f^

YOU ARE the inverse square on
the right of the wall and your
friend is the inverse square on
the left- Throw her the paint brush by
pressing "0", The brush will then go
up in the air, slide along the roof for 1 5
square and fall again. By moving your-
self left and right with keys "5" and
"S'\, see how many times you can Throw
it without missing her.

Over the Wall was written for the
IK ZX-31 by Neil Benson of Wild-
woodj Stafford,

3

JB

SINCLAIR USER September 1933

§

MICROSOFTWARE

FORZX
SPECTRUM

The battle could be yours .....
but it won't be easy I

PARTICIPATION - that is the name of OUR game. All our software contains a unique score verification
mechanism Mowing us to add a new dimension to computer games. Every July and January we will be
publishing a ranking list of the top 1000 scorers in each game with the overall top 100 'grand masters' each
receiving certificates of merit bearing their position.

September is the last month to qualify for the Black Hole championship. However from October the
render of the highest valid score each month will win software of their own choice to the value of £50.

Total fy original game plan Addietfve,
challenging and offering a complete
visuaf experience with its animated
graphics and violent, explosive effects.
Compatible with ALL l eaettftg joysticks.

tfyou

Bre fook(r, Q f

FA- .

y°ur hair
trickery #

'he rrn/r»„

ouJdnW

OAi£§!

O QUEST

^Pyramid

doming
sootts

K

QUEST SPECTRUM SOFTWARE f\ I I PfT
is available from WK Smiths, B ^UCal ■■
John Menzies and «> ■ mm n§ %# TU

Computers For All ■ ■ ■3IIYII LI in

THE BLACK HOLE and VIOLENT UNIVERSE for the 16K or 4SK SpM Mm are o .

QUEST MICROSOFT WAREJ 19 THE PROMENADE. CH0.7tNHAM,GL
despatched hy return first class post together with a membership minter ait!.

on our forthcoming blockbusting software!
Trade Enquiries welcome - telephone 0242 -5 q

TRUr

discoui

t*

|,| (<«* tic

For SPECTRUM 48K or ZX81 16K

You are an Alined POW in the infamous Castle Coldltz, Nazi
fortress jaiJ for Allied prisoners-of-warl Can you escape with your
life through the vast labyrinth of rooms to the main gate? Tackle
brutal Gestapo and SS guards, savage guard-dogs, traps and
pitfalls! Survive if you car's the Corridor of Rats, the Tunnel of
Poisonous Spiders, the Vault of Human Bones and many
more] And on your way, grab all the fabulous Na*i loot you can
carry 1

"Classic adventure games — no random alterations!
"Fast, powerful machine-code response to your commands!
""Save-game" facility and lyou'll need it!)
Hours [weeks? f (months?) af enjoyment!

For ZX81 with 16K HAM £4.95

For 48K SPECTRUM - £5.95

Price includes ready-to-load cassette with library case and inlay,
full instructions, postage and packing. Order today! Money re-
funded if not delighted!

Send cash, P.O. or cheque to:

FELIX SOFTWARE (DEPT, SU12J

19 Leigh ton Avenue, Pinner, HA5 3BW

MZ-8

CMOS STORAGE/MEMORY

WITH

BATTERY BACK UP

FOR ZX 81 1K or 16K

• Fast Load, Save and Delete *

• Stores up to 10 Programs •
i6K total) for instant recall

+ Software in Onboard Eprom *

+ Switchable "Write Project" *

* Alternative use as extra memory *

• Plug-in with connector for Ram Pack *

Inc. Price £44.90

With full instructions

MICRO-Z LTD

PO Box 83, Exeter

Devon EX4 7AF

S.A.E. for full details

INTERCDIMNECTABLE
ANALOGUE INPUT &

RELAY SWITCHING
INTERFACES
FOR ZXS-1 & SPECTRUM

Af.Cti t50 inc VAT

npiit. sensi tivilies from 0-10 raV to 0-5 V

8 channels. 40,000 readings ppr ser.on.rt in mcMm cede.

"ileal lor data capture & cDnucquunc i ng , r.ontrDl & fflom*,
Monitor moat variables ufthnut neediujj an amplifier.

HIGH SPECIF! CATION MODULES

REL4 £55 inc. VAT

HIGH POWER HAIDLISG.

Max const r.urrenL 5A. Max voltage 250V. 1KW per thannf- 1 -
4 channels, each vllh normally open, norm Closed * < cmmon
Use for control of lights, heaters, motors etc.

DAISYCHAIN UP TO EIGHT MODULES

IISC1 £12 Inc VAT

Connection cable, required for LliL' first interface
hkhIliIl'- in a chain*

Send S.A.E. ffir free leaflet or complete the form buluw NOW.

SAME : ____ ,

ADDRESS: .

PleaaC? send me:

QTY, JJJW. PRICE, TOTAL ,*P I ease st^re ^Xfll or SPECTRUM
ADCB £50 11AKLEY SYSTEM I .Ml-.

THE PEPPERBOXES,

at. HISSEWDEJ*,

BUCKS ,

HP 16 yPK.

REW £55

HSC1* £12

Postage El -00

enclose a cheque for £

total .

Is your computer
like spaghetti junction?

<3

j t <.

^3

Not with a Ket wood 0®
Wireless Workstation

• Four 13 amp sockets built-in

• Only one external cable

(rest contained inside)

• Mains on/off switch

• Suits most micros

• From £49.00
Offwr Ketwood Products:
POWER BASE: Angled stand
tor ZX81 and Spectrum
LOAD/SAVE and ON/OFF

switches save wear and tear on connections. From £13.00
COMPUTILT STAND: Raised stand for belter working position, £3.50
WOBBLE STOPPERS: Eliminate Ram- Pack wobble on ZX81. From £5.25
DUST COVERS. From £2-00

For further details contact:

KELWOOD COMPUTER CASES

Downs Ftow, Moorgate, Ftotherham Tel: (0709) 63242

ao

SINCLAIR USER September 1W3

STAQ
SOCCER

Tfw ACTION game with the thrills of real football

Choose your Ham forrnationR *rnrm 3-2-5, 4-?-4, fii -4-4-2
WhBI 1he game marts it's ijp 10 vOu 10 plfifl vour moves and outwtl yfiur
oppnnenrF. Sfse. (fir) r#BUllS rjlayjd uul by fast ma^tii-ie cods r.iui ties on
a birds-cyo vew ot :he 3itch.

Make the split second decisions that the prafgsionals have to!

Shall I make ;hr= short sate pass .nrirl iru^e lu! the dwfsnra '(^griiLp 71
Or do t try a long^Sfini^-spliUirij ball unxi r«sk an interception*

,■ wir»ti yo( thu speed to take on the full haefc and U'jut him?
Do I 1i v a lurig shot anrt catch thegoaif! nff hi; ling?

give the hai'l ir.a- t*aflvm»ls in u bc!t«y position:'
7f* mora [^nuisot '"iitjr Sjoccsr" that yon play, the rrtQ'S skillM vlsl, will become.
¥W1I learn howlDWI up the. grhfll-sCLVi'irvaoopi.jrlijiiU.n.'s. artl how 1u get yourself
uut uf r iyh t curriers. Yaij'lf bevelop your cw F \ Styltul play and find auf which
tarnation sluts ym -

Side 1 features a SUPER LEAGUE BOfflp KW cn

between B top British side*. AbefdeOT, Asn>n Vi'iu. Celtic, L vurutroi,

Ma-rchpstfir Unrmd. Rangp.r-s^P 111 ^- S'Xl We*I Him ^a ijarrie; In all and the

League Tuh 1 *'! is 3vt*onrt3!icaliv rnuirHLJinud for y-ju.

Side 2 replays the WORLD CUP finals. It's ..i knock-ow oomewitiofi

brtween Lrigiisnd. Scotland. N. Ireland, Itsiy, W«l (jftiiT-dny. Frurtc, Brazil
anil Argentina. Lots of excisennent wirn sudcten dfestfi Sxtra time in d'awr »ms

it's amazing how so much is packed into 16K!

Available for ZX Spectrum and ZX©1

ll^taaw slate iMiicfi machine whwi ordering! (JIMLY £5.95

Wa Uon &d 1 .w Eire &erv ices L Id . (De pt . b 1

l, Ivy Cottages, Long Road West, ffcdhiim. Esses CO? 6LL
Tradt; unqums welcome

EDUCATIONAL SOFTWARE

for children *gts 4 -11

EDUC ARE'S,, 5g

Strong r*go*"gS: -~

on th*

ZX81

ntrt

SPECTRUM

SUPPLEMENT

(fiJ9J 122 pig

I All jtrigrwtti mH IK ZXSI

LVOC3

MICRO

\ Model A and Mudtl B J

WITH COLOUR, SOUND AND
OTHER ENHANCEMENTS

PROGRAMS WRITTEN IN
STRUCTURED FORM

£7-95

''*0 »i L) JCk

I** T^

Tries* programs cover a wealth of basic concepts every child
wfll m»»l In primary education. ?"fie>y Are produced by professional
educators and tiava bntrn thoroughly tested in a primary school.
Dasigriad ro go beyond drift A practice they promote learning
through interaction and discovery. Programs range frcm counting
and simple arithmetic to ones dealing with vetume, balance and
direction, mifslly in form ot games. Each program is $ttert but
powerful and comas with tull documentation.

T(N

I EDUCARE

I 139a Sloans St
London
SWIXSAY

copiej Educt'f't Lfl an BBC Micro

I melon th*qi*.'|]Dilal order Igr E .

N.me .

A4dit» . |

Ltl four oma tiwitlir. ttili ■ St*vl now

su

TASWORD TWO THE WORD PROCESSOR

64 CHARACTERS PER LINE ON THE SCREEN AND TO PRINTERS!

TASWORD TWO The Word Processor

Your Spectrum becomes s professional word processor
wPth TASWORD TWO. TASWORD TWO gives you an amazing
$4 characters per line on your screen. This is ideal for standard
A4 paper and TASWORD TWO prints ynur text just as it
appears on your screen.
Tasword Two drives the foliowing interlaces:

Cobra RS232 f/O Pert Kempston interface

Etjroptoctronics interface Mornx Interface

Hilderbsy Interface Tasmatt Interface

Ttfe same program drives these interfaces. A shprt easy to fol-
low set of instructions takes you through setting up your Tas-
word Two to drive the interface you have or choose to buy.
Tasword Two also drives the ZX printer.

t!3'90 fully inclusive mail order price.

TASWORD TWO TUTOR

TASWORD TWO comes complete with a manual and o
cassette The cassette contains your TASWORD TWO and
TASWORD TWO TUTOR, This teaches you word processing
using TASWORD TWO. Whether you have serious applications
or simply want to team about word processing, TASWORD
TWO and TASWORD TWO TUTOR make it easy and enjoyable

TASWORD TWO £2 Demonstration Cassette

Sf?s fnr yourself the powerful features of TASWORD TWO,
Send just L2 for the Tasword Two demonstration cassette. A

voucher is included which gives you £1 off the price of
TASWORD TWO

TASWIDE - 64 characters per line!

A machine code utiliry program. TASWIDE doubles the
information that your own programs can rjispiay, Make a
simple change to youi print statements and your output
appears on the screen at 64 characters per line i nstead of the
normal 32. Both print sizes can be mixed on the screen. 16K
and 4fi< versions supplied on the same cassette.

£5"50 fully inclusive mail order price

TASMAN PRINTER INTERFACE

Plug into your Spent rumand drive any printer fitted with the
Centronics standard parallel interface. Supplied complete
with ribbon cable, connectors, and driving software.

£45 fully inclusive mail order price

All prices include VAT and post and packaging.

TASMAN SOFTWARE

UaptSU

17 HARTLEY CRESCENT LEEDS LS6 2LL

SINCLAIR USER September 1083

ai

ORWIN SOFTWARE: ZX81

THE BEST SOFTWARE (BY VARIOUS AUTHORS) AT LOW PRICES

"Michael Orwin has built a reputation
for value -for -money software and his Cas-
sette 4 offers quantity as well as quality."
Sinclair User, October r S2

"If each game was on a separate tape
and selling for £5 each I would stilt rac
ommend them. But all on one for E5 ... I
This sort of value for money jusi has not
been seen before on any personal com-
pute r, ' '

"Without sounding pushy I would like to
conclude this review hy saying - if you
have a 7X SI and Like games, then you
should buy Michael Orwin's cassette 4.'

2 extracts from ZX Computing, Oct/ Nov

'82

"Eight games, including an excellent

version of the Scramble arcade game - , -

Easy to operate, graphically impressive

and good value for money."

The Times, Saturday 1 1th December 1962

labout Cassette 41

CASSETTE 1
{eleven Ik programs}

£3.80

Machine code:

React, invaders, Phantom aliens, Mozs of

death. Planet lander. Bouncing letters, Bug

splat,

Basic:

I Ching. Codebreak, Robots, Basic Hang-
man, PLUS Large screen versions of Invad-
ers and Maze of Death., ready for when you
get 16k

CASSETTE 2

Ten games in Basic for 16k ZXB1

£5

Cassette Two contains Reversi, Awari, La-
ser Basfls. Wordbreak. Rectangles. Crash.
Roulette. Pontoon. Penny Shoot and Gun
Command.

CASSETTE 3

8 programs for 16k ZX81

STAB SHIP TROJAN

Repair

before
strikes
dude

E5

your Starship
disaster
Hazards in-
asphyxiation,
radiation, escaped
biological specimens
and plunging into a Supernova.
5TARTREK This version Of the well known
space adventure game features variable
Klingon mobility, and graphic photon tor-
pedo tracking.

PRINCESS OF KRAAL An adventure game
BATTLE Strategy game for 1 to 4 players.
KALABRIASZ World's silliest card game.
full of pointless complicated rules.
CUBE Rubik Cube simulator, wilh lots of
Functions including 'Backslep',
SECRET MESSAGES This message coding
program is very txip qexi |f.
MARTIAN CRICKET A simple bill addictive
game (totally unlike Earth cricket) in ma-
chine code. The speed is variable, and iis
top speed is very fast.

CASSETTE 4
ZX-SC RAMBLE (machine code I with 3 stages.
Bomb and shoot your way through the fortified caves.

8 games for 16k ZX 81 £6

GUNFIGHT
(machine code)

INVADERS
(machine code)

"JHEHLOID9 AIRE CftflUINfl HNP
> TMEY REACH TWMYTHBV
^SoKuCE PEHDI V 5POPE3 . YOU

r= TOOE5TROY TME FUNOmLO It* B*

Cropping «nt:i-fungus bome?^ on

-' ICH.

GALAXY INVADERS (machine code*

Fleets of swooping and diving alien craft to fight off.

SNAKEBITE {machine code]

Eat the snake before it eats you. Variable speed. I very fast at top speed).

LIFE (machine code!

A ZXSt version of the well known game,

3D TIC-T AC-TOE (Basic)

Played on a 4 X 4 x 4 board, this is a game for the brain. It is very hard to
beat the computer at it.

7 of the 8 games are in machine code, because this is much faster than Basic (Some of these games were previously available form

J. Steadman)

BYTE-MAN (machine codei
(previously available from Mindseye)

CASSETTE 5 8 games for 16k ZX81
BREAKOUT (machine code)

3&S&T ffi

! __—

SPACE RESCUE (machine code)
{previously available from Mindseye)

BLITZ (machine codai

£6

PLANETOIDS [machine code I

Rotate, move, fire and hyporspace controls.
Wide range of choice of speed and difficulty.

DODGEMS (machine code)

Dodge the computer's car while eating the

dots.

DRAUGHTS (machine code)
Three skill levels.

MERCHANT (Basic!

Make your fortune on trading voyages in the
Mediterranean and beyond.

7 of the 8 games are in machine code because it is much faster than Basic.

Please make cheques payable to ORWIN SOFTWARE.
ORWIN SOFTWARE. Dept. OSU, 26 Brownlow Road). Willesden. London NW10 SQL.

ZX81 & SPECTRUM SOFTWARE WANTED

82

SINCLAIR USER September 1963

FRENCH

VOCABULARY TEST

Makes learning French fun for both
adults and children

A sophisticated program that makes
fuff use of the Spectrum's graphics
and sound capabilities

Special introductory price of £335
Please state which version J6Kor48K

Cheques or RO/s toj-
Tutorial Software. PO. Box 43,
Enquiry Office 22-29 Milt St, r
Newport. Gwent, NPT 3XZ.

H I LHu I ----

From MACQUJLLAN ELECTRONICS Comes

MONICRON

THE QHl r INDISPENSABLE ADD-ON FOR
SINCLAIR ZX8I& SPECTRUM

DttONfCRa6r=:

LOAD programs first time every.

time via VU LEVEL METER

u>

Jt

•.<.<■-• ■ ^"Si- -■.-•■■
it!'- :-• •"

«,^ •■*•*• »■ ;■;
■■■■ * * *» ♦ • ■ ->

■--'■>*:

gMI(3§
_ > ■■■> t

C-J ■ W ' J: -

m

SAVE vis isolating push button.
RECORD speech by built -In M IC
AmPLIFY Spectrum Squeak by

b«nt in AMP: s SPEAKER

R E SE T crashed programs with
power On- OFF switch.

MONITOR tape contents.

:^;^ i U:1;;?;H!i';^;;:"::ir CUE program start etc.

ALL FUNCTIONS WITHOUT DISTURBING A
SINGLE PLUG!

Fdivn:-* ttr rif?, fhrrper & wt1<~n pocket'? ' ONLY Et4'95 plusEI'QOpt-p

From MACQUILLAN ELECTRONICS

11 MERE ROAD, WIGSTON, LEICESTER.

y,x8l nmdd has tapp'rcirmtrrqivilth - state njrwJd when < mitring.

WE HAVE SOUND . . . COLOUR . . . ACTION .
... WE HAVE R&R SOFTWARE

5*fc

v

f ^

?r?u

r $&

} M

v:

/*

<F

Y'V

V
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SINCLAIR USER September 1383

Al

Stephen Sowerby is a member of the Olympic pentathlon squad.
Claudia Cooke discovers how he makes time for training

Leading athlete's quest for

gold is boosted by ZX-81

INTERNATIONAL athlete Ste-
phen Sowerby swears by his ZX-
81. Without it, he says, finding the
time to Train is much more difficult. At
28, Stephen hopes to mate hi? Olympic
debut as one of the four-man modern
pentathlon squad in the 1984 Games in
Los Angeles.

On lop of thatj he runs two busin-
esses near his home in Yorkshire and
spends what precious spare time he has
on his hobbies of photography and wine
and beer making. He says:

"I'm impressed with the liitlc beast
— the ZX-8 1 . I bought it last December
with the idea of upgrading it as soon as I
had mastered it but I don't see any need
now. It does everything I want it to do".

Before buying his computer,
Sowerby had had no contact with any-
thing more complicated than a pocket
calculator but he decided that anything
which could speed his office workload
would be invaluable.

"First 3 1 waded through the book and
made it to work. Then I wrote my first
program, a simple one for VAT check-
ing which has been fantastic. I found
that it was really easy if you used
common sense. Of course, there were
headaches along the way but I sat down
and scratched my head and it all came
out right,

"I am pleased to say that I have never
bought a commercial program. I have
written 10 of my own; the longest is for
helping me to do the accounts. The
amount of time it saves is incredible. I
buy the computer magazines and use
some of the programs in them. Apart
from being fun they can be really help-
ful, too, because sometimes you dis-
cover you have been using five lines
where someone else has discovered a
way to say the same thing in only one
line".

Running his business, as well as fit-
ting in his sports activities, means that
Sowerby is highly-motivated to do
everything in as short a time as possible
and the computer has helped.

"If I have all my work done by a
reasonable time in the afternoon I ean
leave and fit in more training. So the
computer is helping me in my sport,

too". Modern pentathlon is a gruelling
combination of spona, the aim being to
find the best all-rounders. It embraces
swimming, running, fencing, shooting
and show jumping.

"Swimming w T as always my main
sport at school. I won at county level
and was in the national top 10 when I
was 17. Then 1 wenr to Carnegie Col-
lege, Leeds to train as a physical educa-
tion teacher for three years and I
stopped competitive swimming,

"My fist job was as a teacher of PEj
swimming and outdoor pursuits at Dan-
iel Stewarts and Melville College, Edin-
burgh, where David Wilkie went to
school. I thoroughly enjoyed it but after
a year I had the chance to swim com-

petitively again with my old club in
Leeds and so I left teaching to give
myself more time.

"I was trying to be selected for the
Commonwealth Games and that meant
four or five hours in the water every
day. Then I entered the national biath-
lon — swimming and running. I had
entered it and won while I was still at
college and that time I won it again" -

Sowerby is modest about that
achievement, saying that although he
was always the best runner at school, he
assumed that was simply because he
was fit from all the swimming.

The result of his success in the biath-
lon was that the well-known pent ath-
lete^ Jim Fox > suggested he should try

S4

SINCLAIR USSR Sepiembet 198$

User of the Month

modem pentathlon. He had never
Fenced before, never used a gun, and
scarcely ridden a horse but after only
four weeks' training., he entered his first
pentathlon in Cambridge and finished
second, despite the presence of seven
international modern pentathletes.

Since then he has not looked back.
He has risen to international status and
travels the world to compete in events
as far afield as the United States— three
trips already— and several countries in
the EasLern bloc.

"I love the travelling 2nd there are so
many places I know I would never have
seen had it not been for the competi-
tions there. We were in Poland at the
start of the crisis and I learned a good
deal from that.

"They absolutely revere their sports-
men. There were food shortages and
queues everywhere but we had meat at
every meal and the autograph hunters
were all round us".

Sowerby is the only member of the
four-strong Olympic squad who does
not train full-time but he sees that as no
bad thing.

"I have all the practice I need and in
a way I think my job helps, because it
takes my mind off things, K you are just
training ail the time you think only
about your sport and it doesn't necessar-
ily do you any good, You just become
bored waiting for the nest training ses-
sion.

"I am glad I tried the modern pen-
tathlon because 1 am so much happier
now. You have to be good at all five
events but if you don't do so well in one
aspect, it's not the end of the world.
When I was swimming, one race might
make or break me.

"Now I know I am the worst fencer
in the squad but I am training hard and
my running and swimming are strong
enough to compensate for it".

The businesses which Sowerby runs
stem from the enterprise of his parents,
Dennis and Elsie, who formed their
joinery company at Knaresborough 30
years ago. As the business flourished, so
more and more customers needed glass,
so he formed Knaresborough Glass and
now runs both companies with the help
of his father,

Set in a small yard off the main street
in the sleepy Yorkshire market town,
with offices in a building known as the
hen hut j it is a far cry from the glamour
of the international sports circuit but
Sowerby, who last year married a fellow
member of his swimming club, is happy
to return to his hen hut and sit crouched
over his computer.

Since buying the ZX-81 he has also

bought an Olivetti printer driven by a
Memopak I/F which he keeps hidden
under the dK'tronics keyboard.

"The printer has been a marvellous
help, too. I have written a word proces-
sor program and I use it for all my
letters, for final demands^ invoices, ev-
erything really. I begin to wonder what
I did without it".

Sowerby also sees potential for com-
puters in the world of sport. Already
they are used widely for results, as well
as for much of the administrative work,
but he cites a need for them in sports
such as fencing. Each fencer's sword

you can usually do it even when, as in
his case, it seems as if there will never
be the time.

"I do a great deal with my time but I
enjoy it all, otherwise I wouldn't do it. I
will go on as a pentathlete until I stop
enjoying the training. When it becomes
a real chore and you don't want to do it,
that's the time to stop.

"Many people seem to think I must
be sacrificing a great deal for sport but I
don't see it as a sacrifice, because I
enjoy it,

'*The only things I miss are smoking
40 cigarettes a day and probably being

'I have written a word processor program and
I use it for all my letters. For final dernands 5
invoices, everything really. I begin to wonder
what I did without it 5

has a button on the end which lights at
certain points of contact with the oppo-
nent and is controlled by a box mechan-
ism. "That box mechanism often fails
and as there is only one company mak-
ing fencing equipment, there is not
much we can do but a computer to
operate that mechanism could prove far
more reliable and I am sure someone
could make money producing it".

Sowerby feels the project is a little
ambitious for him, although he main-
tains that if you want to do something,

overweight by the age of 18. So where's
the sacrifice?"

Financially, Sowerby has to be self-
supporting in his sport and that can
mean sacrificing some expense — the
Spectrum, for example, for which he
sees no need in his office but on which
he loves playing games for its colour
and its extra graphics.

Any purchase not essential to him
stays in the shop but that could be why
both his business and his sporting ca-
reer are proving so successful.

SJNOAIR U.SKR September HUM

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90

SINCLAIR USER September 1983

Programming

Brute force is the only
way to keep in check

Programmers have long looked at ways of playing chess on
:omputers. Chris Whittington points out some of the problems

BROADLY, there are two main
schools of thought concerning
the problem of programming
computers to play a game such as chess.
The first and most dominant suggests
that the way forward is to use the
number-crunching power and speed of
modern computers to plough their way
through as many possible paths arising
from a particular position, apply some
simple evaluation to the positions aris-
ing in Lhe paths an d Dv tnat method
arrive at the best move. That approach
has become known as the brute force
method.

The second school of thought points
to the highly-successful techniques al-
ready applied by human players to the
problem and suggests that the best ap-
proach would be to teach the computer
to think like the best human players.
We shall call this the knowledge
method.

Faced with the problem of producing
an effective chess-playing program for a
home computer such as the Spectrum,
we can probably discard the knowledge
method, if only because we still have no
real idea how it is that human grand
masters decide on their next best move.
Indeed, what do we mean by best move?
There is no real choice at present other
than to use the brute-force method for
solving the problem.

Before we begin to explore a possible
solution it would be best to examine in
some detail the nature of the problem,
Chess is a two-player game, Whatever is
good for one side is bad for the other
and vice-versa; such games are known as
1 zero-sum games'. That will allow us to
make statements such as this move gives
White a score of +250 and thus gives
Black a score of -250-

The game is played on a board of
fixed size with a fixed number of pieces;
therefore we should be able to represent
the board and pieces in some way in the
computer memory.

The laws of chess define how the
pieces move, whether any position is
illegal — for example, leaving one's
king in check — and how to decide on

wins, losses and draws. In principle,
therefore, we should be able to define
and encode all the possible ways of
moving a chess piece, detecting checks
and so on.

Unfortunately, from our point of
view, a number of different chess pieces
each move in a different manner and
some of them move in some different
manner in special circumstances — for
example castling, ett passant.

I suspect that the apparently daunt-
ing task of defining all those possible
moves for each of the pieces and encod-
ing them into assembly language deters

many a budding chess programmer
from beginning the task. Some of the
early chess programs, and even some
one can still buy, avoided the problem
by not implementing the difficult por-
tions, with the result that their program
just never did castle or capture en pas-
settu

The problem is not as daunting as it
seems; one can work out routines to do
the task and there are published algo-
rithms, and even listings, which can
remove some of the tedium.

Since we have to decide on a best
move we will need some way to evalu-
ate, or attach a number to, any move.
The conventional wisdom is to keep
that position evaluator as simple as
possible, usually measuring the balance
of material and a few positional factors.
It will be of interest to note that the
positional evaluation will be the only
part of the program where chess knowl-
edge and skill, as apart from a knowl-
edge of the rules of the game, will be
required.

There has been much controversy
between strong chess players and com-
puter programmers as to whether poor
chess players can produce good chess
programs. Certainly the best programs
usually have been prepared with the
help of strong players and my feeling is
that substantial chess knowledge is of
most use after the program has been
completed and is being play-tested to
tweak the program to its optimal perfor-
mance by adjusting the evaluation func-
tion.

Then we have the problem of how to
plough our way through all the moves
to arrive at our brute-force solution. In
chess programmers' parlance that is
known as the 'exponential explosion
problem' and it goes something like
this:

On the Spectrum we can evaluate a
position in, say, 25 milliseconds. In any
one chess position there will be around
30 legal moves to consider. Thus to look
one half-move deep we need to evaluate
some 30 positions to arrive at the best
move. That takes 30 times 25 millisec-
onds, or 0.75 seconds.

To search two-ply deep we need to
look at 30 positions and all the 30
positions arising from each of those —
30 times 30 positions in all will take 900
times 25 milliseconds or 18 seconds.
By that reckoning to search three-ply

continued on page' 92

SINCLAIR USER September 1383

91

i= Programming

f (it) ti?}'-i&i Jthjti pug? SI

takes nine minutes, four-ply takes 4.5
hours, five-ply takes almost a week, and
so on.

To achieve good results against
strong players, a program will need to
search between eight- to 10-ply moves
deep. According lo the previous calcula-
tions an eight-ply search would take 4 DO
years to complete. Such a gamej starting
in pre-history might now be nearing
completion.

If we are to get anywhere using br Lite-
force methods we must concentrate on
refining our. search through the tree of
moves to reduce or eliminate the blow-
up effect. As an aside, a game such as
draughts, which has far fewer possible
moves arising from any one posit ion ;
does not generate such severe problems
and thus machine-coded draughts pro-
grams are more likely to defeat strong
players than similarly-encoded chess
programs

Fortunately there are several methods
to refine the tree search. Tile programs
available on the Spectrum and ZX-81
have reduced the multiplication factor
for each ply from about 30 times to
around four to eight times.

Adopting a top-down approach to the
problem, we can formulate our first

statement of the approach we shall be
taking.

We shall use the method of brute
force with refinements, evaluating each
node — position — in the tree of moves
according to a simple and fast evalua-
tion function; biased heavily by material
factors.

The program will need to be as fast as
possible and musL therefore be encoded

'We must concentrate

on refining our

search through the

tree of moves'

into machine code, Basic would he far
too slow.

We shall require adequate tools for
this task. As a minimum we shall need a
powerful editor to work on the assembly
language files. Since those files may be
as large as 40K. byres — 100K bytes
when properly documented — we shall
need a disc-hased system to hold them.

We shall need an assembler program
to turn the assembly language files into
machine code and a monitor program to
help remove bugs. Only after the pro-

gram is running without bugs shall we
consider putting it on to our small home
computer system.

Our nest task will be to break down
the problem further and define particu-
lar areas of the program to which we
must attend.

Main modules — tree-search al-
gorithm; move generator, is king in
check? detector; position evaluator.

Database — how to represent the
chessboard; how to store the moves and
positions as we move up and down rhe
tree; tables containing knowledge about
the position which can be used by the
position evaluator.

REFERENCES

Chess sfiitf in man and machine, Editor, Peter
Frey. Publisher, Sp ringer- Verg lag.
Sargwt, tf CQfftpvtef chess program. Au-
thors, Dan and Ka'the Sprackten. Publisher,
Hayden.

The machine plays chess? Author, Alex Bell.
Publisher, Per/gammon.

Think tike 3 grand master. Author, Alex-
ander Kotov. Publisher. Batstord.

Chiis Whittingtoci, the aotbof of (hi* arricle as
wdl as eighi available chess programs, is now
working on jxt another cfacss program aud wijuld
be [i leased in receive wisdom and new ideas from
readers. He car be OO&tUted eiiher rhroufih Sitt-
efoir Usur or CP Software.

ZX80 ZX81

and

Spectrum

SATURDAY
17th SEPTEMBER

fair

EDINBURGH

AT THE

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This is Scotland* first BIG ZX Fair
Admission - Adults 75p r Children SO;, io a.rtv till 5,00 p.m.

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Organiser . MlKE D0NNACH1E, Telephone Qttl SHUW

92

SINCLAIR USER Sepiembrr 19SJ

THIS SPACE

INTENTIONALLY

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Voir r'iaitu' j see eovld appear here. We rged good, original rnach ne
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SINCLAIR 1 1SFK Srtiwwr m

03

Inside:

Information

The wonderful world of the PCW
Show opens up again on 29th and 30th
September and 1st and 2nd October.

And, like every previous Show, it's
the one and only place for the newest,
biggest, smallest, costliest, cheapest,
finest, micro hardware, software,
bolt-ons and books.

Where the big news breaks first.

At the Personal Computer World Shuw
you'll see the launch of some
astonishing new kit, fascinating
software and vital peripherals.

And you can discover it all at first
hand, scooping ail the magazines.

Know the world of personal
computers-

Just about every micro manufacturer,
software vendor, and goodie supplier
will be at the PCW Show,

Therell be special deals on offer,
too, as well as the chance to enter the
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and watch the 4th European
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Plus the Microcomputing Centre,
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The tims and the place for
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Make sure you visit the PCW Show.
It's on from Thursday September 39th
until Sunday October 2nd, at the
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ini be fully signposted, and is
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The PCW Show: E3.O0 - but to
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Clip and keep this voucher to save 50p
when you buy a PCW Show ticket on
the day

PCW SHOW 50p
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I This voucher entitles the bearer to 50p

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94

SINCLAIR USER September 1983

In the first of a new series, John Gilbert introduces an alternative to
Basic. Later we will be showing how to make use of its advantages

Coming Forth could be a
winner in program stakes

FORTH is a new language in mic-
rocomputer circles but it has
been around for several decades.
It was designed originally to control a
radio telescope. Since then it has been
used in control applications and is seen
as an ideal language for the program-
ming of robots and industrial machin-
ery.

This series will explain how Forth is
structured, how you can program using
it j and how you can change the lan-
guage to suit your needs.

Forth is now seen as an important
language because it is faster in execu-
tion than Hasic and it is one which can
be learned very quickly by a newcomer
to computing.

Some people may find it more diffi-
cult to use than Basic because it does
not use line numbers and the programs
written using it are in the form of
several routines and not one mass struc-
ture. In that way you can have several
programs in the computer at once.

If you are to follow my arguments
you will need to forget about the way in
which you program in Basic. Forth is
completely different and, as you will
soon see, you cannot be as liberal in its
use as yOu were with Basic.

One of the reasons for using Forth in
the control of machinery is its speed
compared to other high-level languages.
For instance; Forth is more than 10
times faster than Bask and a game of
Space Invaders written using it would
move almost as fast as if written in
machine code. The reason is that Forth
is closer to machine code than to other
high-level languages.

When Forth was introduced thert'
was no standard for the language, so an
organisation called the Forth Interest
Group was formed. Since then a new,
second standard has been introduced
which is called Forth -79. That does not
differ much from Fig-Forth but Forth
packages are now divided into the two
standards.

Most of the packages available for the
Spectrum and ZX-81 use Fig-Forth,

although some provide only a subset of
the language. For instance, Forth pro-
grams are divided into screenful Is of
memory. The Artie Forth package al-
lows only one screen in memory at a
time, whereas other packages., such as
that from Abersoft, allow several
scree ns.

There are several packages from
which to choose, so each will be covered
in turn and finally a standard will be
determined for the scries,

Sinclair Research has just adopted
Artie Forth for the ZX-81 and 4SK
Spectrum, which use the Fig- Forth
standard. The package includes the cas-
sullc containing the Forth language and
two booklets. The thicker booklet ex-
plains the language and the slim one

shows how the program editor should
be used. The function of the editor will
be described in more detail next month.

The packaging of the Artie cassette is
colourful but the version of the lan-
guage has some limitations. Forth pro-
grams are stored by the screenful in
memory. Each screen is addressed by a
number, so if you wanted to recall a
program which was stored on screen 1
you would use that index number to
access it as the current screen.

In that way you can store several
programs, called words, in the machine
at any time. The current screen is the
one on which you arc writing at the
moment or the one which is being used
by the computer.

count/mil ■'■'■' :■'.■■■ .%

SINCLAIR USER September 1983

M

i=! Forth

aiTtiwuerf from page. &5

The number of screens which can be
stored in tht: computer al once is^ of
course, governed by the memory avail-
able. It is possible to store several
screens of program in both the ZX-81
and Sped rum but Artie Forth will store
only one. If you want to use screens
other than the current one you have to
load them from cassette, one at a time.
That is irritating because such a process
is not necessary with the memory capac-
ity available.

The other difficulty with the package
is [hat the documentation - the two
manuals — does not provide a sufliticm
introduction mr the beginner. The dif-
ference in approach between Sinclair
Basic and Forth is not made apparent
enough and the transition between the
two languages is not easy using the
manuals.

After all, the user will have a knowl-
edge of Basic and an introduction to a
second language will be much mure
difficult than an introduction to com-
puters through Basic. It often means
becoming used to new concepts and not
just new language statements.

The second package is slightly better
and contains a full version of Forth. It is
from CP Software, called Spectrum
Forth. Owners of 16K Spec tr urns will

be pleased, as CF does a version of the
language lor that machine. Spectrum
Forth also includes a program written
la Forth so that the user can run an
example before delving into the depths
of the language.

The final version, is from Abersoft. It
is also for the Spectrum but will run

Of the three packages available, the
one to be used in this series will be that
from Abersoft. It is the only Spectrum
package which has been endorsed by the
Forth Interest Group. It is a complete
Fig-Forth package which allows several
screens of program in memory at iht
same time.

'Forth is closer to machine code and more
than 10 times faster than Basic. A game of
Space Invaders written using it would move
almost as if it is written in machine code'

only in 4tfK. It has a bigger dictionary
capacity for programs than the 16K
version from CP.

It is a complete version of the lan-
guage with added colour, attribute and
graphics instructions which can be used
to zap space invaders around the screen,
if you are that way inclined. It is also
possible to define your own characters
just as you can in Spectrum Basic.

Unfortunately the product has a man-
ual which is concise but not easy to
understand. It is a flimsy booklet which

has not been written to inspire confi-
dence for the first-time user.

The Abersoft manual is not good but
there are several books on the market
which explain Forth and its application
in terms the beginner will understand.

One good book is The Complete
Forth, by Alan W infield. It is published
by Sigma Technical Press and gives an
introduction to Forth concepts. The
book uses Forth-79 but there is much
information which will be useful to the
Fig- Forth user. Next month I will ex-
plain the structures which are used in
Forth, You will see that the language
does not use line numbers but this
makes it easier and not more difficult to

use.

At last! A joystick that works!

Cambridge Computing bring you the first intelligent joystick.

Works on all existing software - regardless of which keys the program
uses. No need for specially written software. Features include:

• Compatible with Spectrum, 2X81, Jupiter Ace

12 Independent Fire Buttons

1 8 Directional Microsw itched action

► Plugs into edge connector

► Interface complete with edge connector
• Atari joystick compatible

► Joystick with Interface £29.90

Enquiries from dealers
are welcome, ring
Anita Kirkland on
0223-322905

Name

Address..

Please send me :

joystick, interface, and rape G? £29.90.

SpectrgmD ZX8lD Jupiter AceD

interface and tape @ £24.00

SpectrumD ZX81D Jupiter AceD

..........joysticks @ £7.00

SpectrumD ZX81Q Jupiter AceD

Total including VAT......

i€ CAMBRIDGE COMPUTING

Please make cheques
and PO.s payable to:
Cambridge Computing
1 Benson Street,
Cambridge CB4 3QJ.

SU9

SPECTRUM AND ZX81 HARDWARE

ZX KLIK—
KEYBOARD

;*

i

The famous Panda Expandable
Ham Pack. Massive 16K add-on
memory which can easily be
expanded To 32K v«ith an optional
plug-in module. Supplied in
rugged no-wobble design,
rugged, injection moulded case,
contoured to fit the ZXfil snuggly.
Compatible with other add-ons
(printer etc)- LED on/ off indicator. No
additional power needed just plug in an go. British designed
and made from top quality f 1 Q QC

components throughout, guaranteed 12 months. 3L>1«7 "D
•^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^™

EXPANSION MODULE

The 16K 'Panda 1 is easily expanded
from 16K to 32 K by adding this
expansion module as and when
you need it, CIA

50

GIANT PANDA

Giant Panda the two together. Buy the Panda and the
Expansion Module at the same time for a gigantic 32K bytes

and save. C*1A . flfl

Complete at a special price of *0*± * UU

PROFESSIONAL CASED
KEYBOARD TYPE FD42

FOR ZX81 OR SPECTRUM ^^

This famous, best selling product immediately converts your
ZX Computer into a sturdy, attractive and professional unit,
with full size typewriter keyboard A tough plastic case
encloses the keyboard, PCB and power supply. It has 42 keys
including all the ZX81 /Spectrum graphic characters printed
on them. The full travel key switches have gold plated
contacts and guaranteed life of 10 6 operations. It's so easy to
install! You simply unscrew the ZX PCB from its case, screw it
to the FD case, and plug in the keyboard. No soldering .
Access to user port is unobstructed for memory poq QC
upgrade etc. Full instructions supplied. wb9 " UO

Fitting service *T " UU

RAM Adaptor Board — enables you to fit 1GK

Expansion (all types! inside

Fuller-case—

£9 75

TYPE FDS FOR ZX81 OR SPECTRUM

Our new advanced keyboard has the same, fine
specifications as the FD42 system, but with a new re-
designed case, space bar and double-sized shift and enter
keys. A must for the discerning ZX8 1 or

Spectrum user.

If , like many ZX8 1 users, you are fed

up with the dead feel of the

touch sensitive keypad then

consider the well tried 'Klik-

Keyboard\ This is a simply fitted genuine push

button keyboard which has been designed as an exact

replacement for, and is no larger than, the existing keypad,

■ Fits on to the ZXfll. ■ Full 40 keys plus one spare for any
purpose. ■ No soldering — just plug in. ■ No trailing wires,

■ Clear permanent two colour legends. ■ Positive feel and
sound as data is entered. ■ Speeds up programming
enormously and reduces errors.

■ Fitting service offered £2.00 extra CO A . RA
(remember to send your ZX81). Xrbfl " DU

SPECTRUM JOYSTICK

NOW AVAILABLE FROM AFDEC
Outstanding Features

• Self centring slick.

• Super strong nylon and steel
construction, built to last.

• A total of 8 directions plus Z large fire
buttons.

• Arcade proven moulded leaf
switches ensure incredible reliability.

For ZX Spectrum Complete with self
contained box interface which simply plugs into the
Spectrum expansion port COK.

(with or without printer) dfc^D

^

00

THE SOUND EXPANDER

A superb economical addition to your 2X Spectrum. Clear,
dynamic sound effects will really enhance your enjoyment of
the new exciting programs available for the Spectrum. Our
new sound amplifier comes with lead, pre-setable volume
and built-in loudspeaker. Simply plug into the mic input,
it fits neatly behind £17 ^a

the Spectrum. oti " 3U

STOP PRESS!

REDUCED due to volume sales

1 BK Spectrum owners— upgrade to 48K with a Spectrum

Upgrade Pack complete with full instructions.

No Soldering.

Issue II and III.

£26 00

The lowest cost
16K RAM pack
known to us!

■ Boxed ■ Tested ■ Guaranteed

■ Thousands in use.

£18 50

£39 95

Please supply (state which computer you have).
Quantity Item

Amount

E3<»

Round-the-clock telephone orders 0356 532CK3
r wish to pay by

Access/Barclaycard/Visa/Diners Club
Please debit my croditcaid a/c

number nnmnm n i immn nn

Signed , ,„„,„,.„

AL £inV£ett bucLude VAT Hjixt past and packaging. AL items inrJuda a full yc»2 g\uaTOite« Py^liK-ra
aie slocSut'd and muaOiy despatched TCthia ]Q davrr. Ovcnou cil£1g?yuitb Add £4 pism a=ir1 fACtuig
Chenilles /Pu^bti] Oldens etL - . shouJd be made pvyibje id APDE2C Rlrcimnics £jd

Name) ^_^

Address —_

EXPORT ORDERS WEUJQME PLEASE ADD £4.00 P&P.
Round-the-clock telephone orders 0256 53208

AFDEC

ELECTRONICS LTD

318 Kempshott Lane Basingstoke Hants RG22 5LT

Our new cased keyboard nas 52 keys, 12 of which are used for the numeric pad. The numeric pad offers useful features, you

can cursor with one hand and it will be a boon for anyone who enters a lot of numeric data. The pad is a repeat of the 1 — 9

keys, it also has a full stop and a shift key- The numeric pad keys are red in colour, the normal keyboard keys are grey, with

the case being b|ack, which results in making the keyboard very attractive. The keyboard case dimensions are: 15" x 9" x 2%'

The computer (either 80/81 or Spectrum), fits compactly inside.

You wfll have to remove the computer from it's original case, it is then screwed to the bas« of the case. The case has ail the

bosses already fitted and the screw holes are marked. Also fitted inside the case is a mother board (81 model only}

which atlows 16K, 32K and 64K to be fitted in the case. All connectors are at the rear of the case i.e. Power, Mic,

Ear, T.V. and the expansion part. The case is Earge enough for other add-ons also to be fitted inside- One of these

could be the power supply then you could very quickly fit a mains switch or a switch on the 9V line- This

means you have a very smart contained unit.This case does not stop you from using any other add-ons

that you may have eg Printer etc. We are convinced that this is the best keyboard available at present.

It offer s mo re keys and features than any other keyboard in it's price range.

MffSooo

The case can be purchased separately with the keyboard aperture uncut, therefore if you
possess one of our early uncased keyboards, or in fact, any other suppliers" keyboards
these could be fitted. The keyboard is connected to your computer by a ribbon cable
and this h&s connectors fitted which simply push into the Sinclair connectors. It
is a simple two minute task and requires no electronic skills. This keyboard
does not need any soldering, Please specify on Order whether you
require the ZX81 or Spectrum case.

This is supplied with Spectrum legends, and a slightly different
base for fitting the Spectrum inside, again, all the connectors
are at the rear of the case and there is plenty of room for the
power supply (and other add-ons). Should you wish to
change, we can supply both the Spectrum legends and
details of updating your case which will enable mod
fication from the ZXB1 to Spectrum. PLEASE
specify on your order whether you require the
ZX8t or Spectrum inside.

iroia

16K Memory £22.95
64K Memory £52,95
16K (Uncased) £19-95
64K (Uncased) £49.95

MKII£3Q

- «**■

*-)

«J| ***

(Ktronks

If you have ever had
white outs or system
crashes this could be the
answer, it stops the move-
ment between the com-
puter and the RAM
expansion, it is supplied
with a ribbon 6 inches

DK Troni«, Unit 2, Shire Hill |nd Est, Saffron Wdden lon 9' «'* a male connec-

tor at one end and a

Essax CB11 3AQ. Tal: (07991 2G350 |24 hrsj 5 lines. , .

female at the other.

©Era Sao

98

SINCLAIR USER September IW3

IMS M ©MSf £(B.©g

This is the toolkit which won acclaim in the feature in the
August 1982 issue of Sinclair User. "It is the most impressive
prog ra mm, fast in execution with clear and full instructions .
. . . it stands out from the rest of the field". The ZXED is
a powerful editor for use on the expanded ZX81. It is
intended for use by the serious BASIC programmer and
offers several useful and time sawing features most helpful
during all stages of program development. The facilities
provided are as follows: ALTER, BYTES r COPY,
DELETE. FIND, HELP, INSERT, KEEP,
MOVE, RENUMBER, AND VERIFY.
The Spectrum Toolkit contains most
of the features above plus
auto line numberer and
append, and will run in the
16K and 4SK Spectrum.

4us

1BAIH&86I

This module unlike most other
accessories fits neatly inside your com-
puter under the keyboard. The module
come ready built fully tested and complete
with a 4K graphic ROM. This will give you an
unbelievable number of extra pre-programmed
graphics. This now turns the 81 into a very power-
ful computer with a graphic set rarely found on larger
more expensive machines. In the ROM are lower case
letters, bombs, bullets, rockets, tanks, a complete set of
invaders, graphics and that only accounts for about 50 of them,
there are still approximately 4QQ left (that may give you an
idea as to the scope of the new ROM). However, the module
does not finish there, it also has a spare holder on the board
which will accept a further 4K of ROM/RAM. This holder can
befitted with a 1 K/2K/RAM and can be used for user definable
graphics so you can create your own custom character sets.

a

The so called speaker in your Spectrum is really only a
buzzer. With the DK Tronics "SPECTRA SOUND" you can
generate fully amplified sound through the speaker on your
TV.set. SPECTRA-SOUND is a very simple but highly
effective add-on. This means that you no longer have a faint
beep but a highly amplified sound, which can be adjusted with
the TV volume control-
Trie SPECTRA SOUND fits compactly and neatly inside the
Spectrum case and is connected by three small crocodile

*■■ Bsnw nf 8M-'

$

LIGHT PEN

The pen enables

you to produce

high resolution

drawings on your

own T.V. screen.

The controlling

software supplied

with the light pen

has 16 pre-defined

instructions. These

are chosen from a

menu positioned

at the bottom of the screen next to the pen.

You can utilise the menu for changing colour (Border, Paper,

Ink}. Drawing circles, arcs, boxes, lines. You are also able to

fill any object with any colour, and insert text onto the screen

at any chosen place. Of course you can also draw freehand.

There is a feature to retain the screens and animate. On the

48K Spectrum you can retain 5 screens.

You can also use the machine code on Its own in your own

programs, for selecting out of a menu etc, The software

provided will return with the X,Y, cords for it's position on

the screen.

The light pen is supplied with a control interface in order to

adjust the sensitivity /pen alignment.

This simply plugs into the ear socket on your spectrum.

Should you require further details please send a S A.E,

□

□

i-»~~T L 1

ii linnnr

1 . "

■■*B

f^r 1 ™u 1 I

Internal fixing for
ZXS1 keyboard case.

Internal fixing for
spectrum keyboard
case.

I
I
I
I
I
I

Ptease state type of machine, which ROM memory sire, quant] tv,
and place wh^ri ordering .

Please send me . , ■© £

Please send me @ £

Please send me . @ £ . . .

Pleas*? add on £1 .25 for p/p

I enclose cheque/P,0. pa /able to OK Tronics total C

xn

or debit by Aecess/Barclnvcard No.

1T^

Signature.
Name . . .
Address

1 !

Send to DK Tronics. Unit 2, Shire Hill Ind Est, Saffron Waldan,
Essex CB11 3AQ, Tel: (0799} 26350 124 hrs| 5 lines.

SINCLAIR USER September 1383

99

offers the most sf

under the Spec

"t'mul and du- Pn'slii »ii*W -±w tradt marks o/Britith Tckiom mimuaiii w
Viutttuibfri an-, mpainbti for nuarwiy Mktimtf S00 aid Pr&icl labtcriptivn chirgiS-

Micronet 800, The spectacular service
that gives micro-users access to a
huge database of information, hundreds of
software programs, and communication
with other users.

Sinclair ZX Spectrum, The home
computer that's out-shone all its rivals.

Bring the two together and it's a
combination that opens up a breathtaking
new world of microcomputing possibilities

Suitable for either the 16K or 48K
versions, the Prism VTX 5000 modem was
designed specifically for the Spectrum and
fits neatly under the micro.

Rug the other end into the outside
world via your telephone and your system
will give you more than you ever dreamed
possible.

Micronet 800 is
fun, friendly and
inexpensive to run.
Choose from hundreds
of free games, down-
load and use them on
your Spectrum when-
ever you like, play on-
screen games (as easy-
and inexpensive -as a
local phone call), and
compete in Big Prize
games and quizzes. There's also a range of
downloadable games you can buy for less
than over-the-counter prices.

Learn through up-to-date education
packages, and help run the household with
simple business packages.

Toother

Spectrum

users

\TJk

P B E 3 "I E L
E 5 T E L .

And if you need fast facts about the
world of computers, Micronet 800 provides
constantly up-dated product comparisons,
reviews, prices, dealership and *best-buy'
information - 24-hours a day, 7-days
a week.

You can access the whole range of
PresteF information covering news, travel,
holidays and entertainment, together with
an electronic booking service.

Keep in touch - you can send electronic
mail to any other Micronet 800 or
Prestel user.

The VTX 5000 provides a mil Prestel
screen with graphics, and an off-line
message composition facility for speedy
transmission when you go on-line.

You can use the Sinclair printer to print
frames and messages, or save
them on tape for future use.

All this -and even more
as the service grows -would
normally retail at the low price
of £99.95 inc VAT.

But if you join Micronet
800 before September 30, we
will make you a very special
offer.

Micronet 800 will provide
the VTX 5000 inclusive of VAT,
post & packing and (if you need it) a free
jack plug installation for the incredibly
low price of £74.95 -a saving of £25 on the
normal retail price *

j.

i.

So don't delay - send the coupon

today.

Micronet 800
nectacular add-on
ctrum.

Jll Hcase send me a complete Micronet 800 information pack containing details of Micronet 800 and |
Hit VTX SIMM), and including a Micixinel subscriber^ application form, (Pteai* ttliow I

□ tleasc send mt (No.) VTX 5000 mudeints) at £74.95 each inc. VAT: 28dto/sjor I

O I enclose a ■chctiu t mad* payable to Tclemap Lid. for £ delivery.) I

I wish to pay by credit card: Visa, Access, Diners Club, American Impress.

(Delete as applicable) Amount £

,Vly credit card N«- is Signed

\S

Name

Address

lei:

H*J4

0r» ol Ihe many faces cm Prestel.

Micronet 800, Scriptor Court, 155 Farringdon Road, London EC1R 3 AD. Tel: 01 -27ft 3143.

rmWmm^ssmmMfimmm^ml

JUST 10 REASONS WHY VOU NEED A ZXB 1 PERSON*

1 facility to reset a croshed system wihouTpijilrng trie plug.
I Eittia lines for una megabyte expo nslon,

3 Din 41612 sioncia'fJ conrecior Reflect qantgcts lor $4 gold-
plated connections.

4 GoM-plotett corrwclilr foe limn conriscliDn to fie ZK91.

g ratable power connection plus battery rjadt-u p points far

(oilsa't operalion.
Ca ntroller Id co-onjinute oil psripteraJs
i Cirtu itry to su patvise and mainiain memory odd-arts.
A Power drivers to minimse loading on ZKS1. More' expansion

wimnotrouWes.
f Ertrg sources or power sMpplves 10 eliminate ffuerhBating on

the ZX81
10 4" of high ctuaiirv ribbon cable ot no sjitrg cost

ORGANIC MICRO - YMJRKETTTOTHETOWSH OF

povrtt-

ORGANIG MICRO is o Building Block system.
Eflqri module p : ugg Into eoen olrw giving you a
complete [ond modular) ronge of options. Eaeh
module performs lis own function or works m
conju nction with aach other fo provide integrate
Tuncrigris. Of course, in order lo achieve thisyau
need the r nht "FourdoHons' The foundation is
the direct iriterfacewnich wa coll PERSONA, it is
the ' Bro in s" of the whole operation orvd simply
plug* into your Computer. Thereafter, ony
u pa/ode facility you need s neatly stacker! into
'the PfcRSWA, ei : her permanen'ly or when
'equirea. In short, an GRSAniC MICRO will save
you forever, no motter how big you wont to
grow.

HOW TO ORDER

To purchase any of me aocwe items, please fill
in trie coupon below with your nome and
address enclosing your cheque or Postal order.
Shouia you need any further information you
moy tele phone u s du ring norma 1 working hou rs.
send for our Brochure, or enquire ai GREENS,
DIK0N5.W H SMITH or BOOTS.
Move info the Computer world with ORGANIC
MICRO -ORDER HOW!

%l RASICARE

BASICARE , MCMswiEMire.

MJCRO WMCKETSTWn.

CVCTFM J UJHDOHSWeiRV

you simply chose me following modules you
want and plug Iherti in (0 Ihe PERSONA ond turn
your ZX81 or ZX SPECTRUM into o tolal
Computing package

PERSONA ZX81 EM.lt

PERSONA 2XSPECTBUU UO.OC

RAM08GK) M«.H

RAM16 K».7J

RAM 64 f7f.3I

MINIMAP *W.M

DRQM CZh> Ht-H

TOOLKIT 131.11

PERICONa 117.*

PERIGONb US.7!

PEPtlCON c **1.7S

SONUS «30,H

Options' USE FONT ES.OC

Addrtionol2KfdrRAMOB UM

Additional 2K from DROM f 7,S<

Prices include VAT Postage onrj Packing lor UK
celeries Overseas Orders please add 15% to
price for surface moil

"esIIC e*3IC*RCWCf»C5VSliML:L:
BRICHPSIfiEFI lONDONSWB'RV T* CI 3855115

■Mihhb- sunn nit v*u ■ ■ ' Liotfrjre. I e^o^stc
Hige- damped addrcwnn™-
IwCuld MM la Punc-l[l5flttiel0la»ing Heirs,
(p tgai 5lclc Mir aiiCSO ffl 'sms i«,i r«1
tvi^r^mp li«! nht^tj

I enclose cheque/P.O for E
NAME

COMPANY: . .
AOOftESS

tei (Day)

Tel (Eve)

Spectrum and ZX-81 Mukbus

Minrnt«xt Ml K I Ltd. 18-24 John Street, Luton, Beds LU1 2JE.

Microtext <U.K.) Ltd,
Tel: (0582) 418894

MUKBUS CARDFRAME

* 6 Slot Motherboard complete with connectors

* Fully Buffered 64 Way Signal Bus

* On Board Reset Switch

+ Sinclair Edge Connector Expansion

* Compatible with Microtext Accessories

* Coming Soon:

•
*
*
*
*

18-24 John Street, Luton, Beds LU1
Telex: 826801 (Letrit G)

"V

*

32K Ram Board

Disc Interface Board

Bar Code Reader Board

Full 80 Column Video Interface

Digital/Analogue Board

Full Colour High Resolution Graphics

Board

Centronics/RS23Z Interface

PRICE £34.95 (including VAT} (plus £2.00 P&P)

MUKBUS POWER SUPPLY

* 2 Metre Mains Cable

* Illuminated On/Off Switch

* 5 Volt @ 5 Amp, 1 2 Volt @ 3 Amp.
it Capable of Driving Full 8us and Discs
PRICE £34.95 (including VAT) (plus £2.00 P&P)

MUKBUS KEYBOARD

* Professional typewriter style (Nice 'feel')

* Fully colour coded (for ease of function operation)
* Cursor Pad (for single handed use)
* Automatic Defete Key (easier to edit)
* Unassigned Keys |for the engineer)

KEYBOARD PRICE £39.95 (including VAT) (plus £2.00 PS>P)
KEYBOARD CASE £9,50 (including VAT and P&PJ

Please state ZX-81 or Spectrum

when ordering or making enquiries.

102

SINCLAIR USER September 1983

Former school chum now
looks after the money

In the management changes at Sinclair Research last year, Bill
Matthews became financial director. He talks to Claudia Cooke

BILL MATTHEWS sits in his
office and smites at the recollec-
tion of his old school chum, Sir
Give Sinclair; tinkering with radios
while the other boys listened to them,

"He was innovative even at that age,
you know. He was always tinkering
with something and he made his first
matchbox-sized radio while we were
still at school.

"We lived very near each other in
Guildford and I remember going to his
house for enthusiastic demonstrations
of his latest plans, I think he was very
much an individual character and did
not fit into the standard schoolboy im-
age at all".

A great deal has happened to both
men since those early days at St
George's School, Weybridge, Surrey.
Now, once again, they art: together. Bill
Matthews having joined Sinclair Re-
search as finance director last Septem-
ber.

"I was working in Toronto last year
and Olive had to go there for a Mensa

conference. We had lunch and he asked
me if 1 was interested in this job. I
thought what the hell, why not? Here I
am, thoroughly enjoying it".

The two men, in fact, worked
together previously, but in the very
early days of Sinclair Radionics, "I
think I kept his cash book or something
when he was busy packing-up and sell-
ing little bits by mail order. It seems a
long time ago".

Matthews, now 4^ and married with
four children, went straight from school
to read economics and business admin-
istration at Sheffield University. He
followed that with training at a firm of
accountants in London, qualifying as a
chartered accountant in 1963.

The first five years of his career were
spent in public accounting in Turkey
and Italy. "It was great to be able to
travel and, having been released from
all that studying, I did a reasonable
amount of work but certainly nothing
you could call strenuous".

Then followed marriage and the offer

of a job with ICI as a group accountant.
He Spent four years there and still
considers it one of the best-run compan-
ies for which he has worked.

He moved on to become financial
controller for Sony U.K. for two years

4 He asked me if I was

interested in this job,

I thought what the

hellj why not?'

and was involved in setting-up the com-
pany's successful television factory in
Wales. Emigration to Canada was the
nest step, working for management con-
sultants Price Waterhouse. His most
recent job, in Houston, Texas, was as
executive vice-president of a company
with clients from the oil and gas indus-
tries.

cpitltmmd on pugf 104

SINCLAIR USER September 1983

101

Inside Sinclair

amtiwuJ from page 103

A varied career hut one which has
always involved him in the use of com-
puters, particularly for management in-
formation , The finance department at
Sinclair Research is now in the process
of computerising its system with an
ICL 25. Matthews expects it to be of
considerable help in financial reporting
and control.

One of his first tasks at Sinclair was
to place 10 percent of the company
shares with institutional investors, an
offer which was well-subscribed. He
says:

"We see ourselves getting a Stock
Exchange quotation in two years. It is
still our intention to ktcp the company
Small in terms of the number of people
employed; that concept has not disap-
peared.

"Sales have grown substantially and
we have reached a Size where we could
issue shares and get a public quotation.
It will be our coming of age, if you
like".

Matthews sees one of his tasks as
ensuring that Sinclair has sufficient re-
sources to continue to grow rapidly and

'We have to be

careful because the

life expectancy of our

product is fairly
short 5

ensuring that those resources are gener-
ated from within the company — from
its profits. No easy task, he admits.

"Coming from a financial back-
ground, you find all companies have a
great deal in common. The exceptional
rhing here is the sheer speed with which
we are growing and the dynamism of
our research activities,

"It can be a problem to find the
resources to cover all that development.
!t creates its own problems and puts
exceptional pressure on everyone who
works here but it also creates a much
more optimistic altitude among the
staff. We tend to pay better than the
normal market rates to get good people
and it is a marvellous team".

Matthews says the company philos-
ophy will always be to design products
which are inexpensive and produced in
large volume^ thus making them widely-
available.

"I think the Sinclair computers are
marvellous little machines. We are just
seeing the beginning of a revolution in
the use of computers. The first stage

was to make them so inexpensive that
anyone could use them and Clive has
certainly done that.

"We have to be careful because the
life expectancy of our product is fairly
short. You can be fairly sure other firms
will catch-up rapidly. We have to make
the best use of that technical lead and
exploit it fully > to the best possible
advantage. We cannot afford to sit still.
In three years I do not suppose the ZX-
81 will be marketed. We are not making
pyjamas for Marks and Spencer after
all; that kind oT thing you can probably
go on selling for about 200 years.

"We must have a stream of new and
innovative products all the time and we
must remain inventive 1 ".

Listening to those exacting standards
is tiring but they are the standards
which have taken Sinclair to the top so
quickly and Matthews has absorbed
them with equal speed. Approximately
half the staff of Sinclair Research is
involved in research and development
and Matthews intends to concentrate
substantial resources for its continu-
ation, buying new premises and rational-
ising existing ones.

With Sinclair products tending to be
market firsts, Matthews admits there is
often a tendency to underestimate the
product. "w T hen sales are restricted
they are restricted by the ability to
produce rather than lack of demand for
the product but one has to be cautious
to a certain extents" he says,

"You are making a commitment to
the subcontractor, so you have to be
careful not to over-estimate the demand.
Then The Subcontractor has to buy com-
ponents and perhaps hire people. So
you have to be as realistic as you possi-
bly can.

"Producing new concepts means a
greater risk element and greater flexibil-
ity in financial control You have to
keep re-assessing the situation in finan-
cial terms and try to predict what will
happen".

Because the Sinclair market is largely
domestic it is by nature more volatile
than selling to big industry. This is
another factor Matthews has to take
into consideration. With all that on his
mind, Matthews, who displays a Casio
calculator on his desk* has not y^t had
much free time to experiment with the
Sinclair products.

His eldest 15-year-old son has com-
pensated for that. He has two Spec-
trums at home and, his father says,
spends most of his time sitting solidly in
front of them, lost to the world.

He has has two sisters, aged 12 and
13, and a five-year-old brother, but

none is yet showing the same enthusi-
asm.

Matthews likes to keep fit in his spare
lime and when I visited him was keenly
awaiting the Sinclair half-marathon due
in Cambridge on July 17. No newcomer
to running, he participated in last year's
Boston marathon. Nevertheless he was
taking the Cambridge event seriously.
So, no doubt, was one of his fellow
runners, Sir Clive Sinclair. Their
speed, it seems, is not confined to work,
nor their competitive spirit.

Matthews is reluctant to predict how
long he will stay with Sinclair but says:
"The chances are it will be a long time.
I am really enjoying it so far and with
the effects of recession hitting so many
companies, it is fine to work for one as
successful as this.

"We have built a very big turnover
and we have the financial resources to
expand into the future. That all gives
the company a great deal of strength".

As part of the Sinclair management

Bill. MATTHFMS

''Sinclair computer* ant- mnrvrlloii!!
little niathintv

team, Matthews attends the monthly
meetings of the board, together with Sir
Clive, Nigel Searle the production di
rector, and two research directors.

At the moment the board doubles as |
management committee which has en-
abled Matthews to look at every aspect
ol the company within a short space of
time. He likes what he has seen and is
full of praise for everyone, from the
genius of Sir Clive through the dedica-
tion of the rest of the staff down to the
excellent quality of the company can-
Teen.

In short, he appears to have been
converted and he speaks as if he has
been with the company for years. St
George's, Weybridge should be proud.

10-1

SINCLAIR USER Siftmitr 1983

NEWS

from SPECTRUM

SALE TIME

Most SPECTRUM members *rill be haliJ rig
Innramm irtrjrvifjunl HOT SUMMER SALES
with 1000'b of b#rg»iri5 at super LOW,

LOW prices ■ check with your local
SPECTRUM dealer NOW! You could be sur-
prisEd a' lust haw much you can save Ht
SPECTRUM

COMMODORE

The powerful COMMODORE 64 now only
E229 fr'j'i- SPECTRUM a truly superb
micro la r ousiness or personal us*.

ATARI

ATARI aOO & 400 mode Is now a! sen-
SLarl onal LOW p-rl C*9 from SPECTHUM - see

our ad. fQr lurther detail t

SOFTWARE

See our super range of SOFT-
WARE from top Am ef lean &
British companies

NEW SPECTRUM
MEMBERS

Check our address pagel - There are
many new SPECTRUM dealers

throughoul I he UK so there's a Good
chance there'll be a SPECTRUM
cemre near you.

PRESTEL

See PRESTEL Page 600181
for up to date information
from SPECTRUM

AFTER SALES CARE

SPECTRUM service centres will ensure Eti-at
ahou Id you< mac h i ne 'go down ' w* Wl II f|*t It
running 19a In at quickly «■ posilb-l*- We
a £C O'ler »xt«nd»d warrant I •» a1 reasun-
able [trices too 1 - ask yaur SPECTRUM
HOME COMPUTER CENTRE lor lull O&tails..

COMPUTER DEALERS

(or prnspsd ivb Oirfipul a r dee ib rs 1 ) II. you would
likh :rt hnc* mo'« about becoming a SPECTRUM
APPOINTED DEALER 31 g.n fixciu-g^e area
basis, please ivrHe 10 MIKE STERN, Spectrum
[UK] Ltd., Burrowfield, Walwvn Garden Clly
Herti. or tolephorve {070731 34781

Now a powerful business micro with enormous
memory for the price of a games machine. The-

COMMODORE 64

Jf Sensational ▼

1 NEW low;

\ PRICE! /

'«„':*!&: <*>■&*:&& ii^ii. :

W.

Just look ?! thisi incredible na* price on ihe
acclaimed Commodofe 34 ai Spectrum now 1
The Commodore 81 comes with an exceptionally
powert u I «i em ory - a mass! ve G4K Ft AM - pi u s a
wide-ranging specification that makes for
superb versatility. It's a Id ol computer, and
qui la outstanding value al sutri a taw price. The
64 '8 le-atures include: • 64K RAM »Z00 Pro-
cessor option •Dedicated video chip
• Sprite 3-D graphics • Music synthesiser #-
Prestel link •High resolution graphics
(320X200) 116 colours *And lots mora -
see your SPECTRUM dealer MOW!

Sensational value at only

£

229

Disk drive for Commodore 64

£229.00

COMMODORE VIC-20

Package Offer!

jy-w^w^'iWfy

LYNX 96K

■ ' "■-■ , ' -,■-■-, w. .

,:a?.<mii--

A complete Home Com puts r system including the
VIC-20 Computer, a Cassette Unit, introduction
to BASIC part 1 - a simple explanation of com-
puter program s, - Blitz, Type-A-Tune, Race 4 Hop-
pit. A fantastic dean! anri great value-for-money.
But HURRY! Offer only while stocks lest.

Sensational

Value

ONLY

£139

Special new LOW price on VIC-20
cartridge games from only £9.99

■ More power ■ More features

Now from SPECTRUM • the new LYNX 9&K ottering
more workspace for ambitious programs. The

most important feature ot the 9&K machine is its
additional memory. In full higti re-stsiutior. colour, t\
provides 37. 5K of RAM directly accessible In
Basic - with up to 34K more available to programs
using machine code. Ask to see the super new
LYNK 9pK at SPECTRUM - NOW!

RQQQ-OO

LYNX 48K Model -spectrum price £225

For the Lynn owi>ar» who'ra ready to tike the nait it>p. tha
4flK mac hlne canbt upu r nd »d to i u 1 1 96 K apac I r leatl on, for J u *t

cea.vo

TURN THE PAGE FOR MORE SUPER OFFERS FROM SPECTRUM

SINCLAIR USER September tm

105

TEXAS TI-99/4A

TEXAS

Software
Cartridges

Now from QNLV

£11.95

*■ ■ ■ ■ ■ ",

Exceptional *alue Bom SPECTRUM hmo. represent-
ing of obablythellriestnom-* micro com puler valtuj
Bl ft M iWt»ttadBv , -TheTEX*STI-9g^*isUiiillto
a" extremely hiah 5i*n«JarrJ aid is tilghiy rec*iri-
msnde-rJ bi/SPECTRUW 1<n Hi utter pliability.
■ lGKflflMlatfpanrlnrsletO'i&Kl ■ Hulll in UK Hy1e
BASIC interpreter ■ 1 6 Bit MicroproesMfil « IB
CfllOu r H igjh Rcivolul ion gr? p^s ■ U ses «•■&?.* 'aid- in'
cartridge modules ■ now onV Ett-W at E*tsralva
ranqe d solid alii* software command modules
available from g^mesloaflrhileniural aids SOot c-niii
proynimfn mq lanauaKHW LfCSD. PASCAL, V -L OCiO &
ASSEMBl ER

Check with your
local SPECTRUM
dealer NOW for
our super new
LOW price

ORIC-1

i i -j ■ o_ _?

lAnAmiL

at JM «J|. PaT, V PB Bl PR

Special

ORIC PRINTER
Offer!

Get a £40 Cash Voucher

rede am able against an Oric
Printer when you buy the
ORIC 4SK computer from
SPECTRUM asK for details

.* superhly designed antf angin-
eerril micro and greet valuator
money I'Din SPECTRUM. Ottering
4FJK RAM Colour ■ (8 forcnryund
a nrj a iTsckgroimd ca n tx; ii isplavet)
al 1he &amf> lime* High r#»oliiUftn
gnjphiGat>6flrd«nfiablflG'»pnicB.
Full sound IS neuUnW or conlroll-
able standi Easy to use keyboard
»»ith moving keys. Standard C»n-
Ircnic* parallel interface »How»
easy CTinneclitm 1* a wide range of
printers ate

Nuw available- PAS.E

Spectrum

Pric*

ONLY

£

139

SPECTRUM FACTS
Ma*in"iLJrri Li Smi PAM

Teal Stieem

Hnjh Reao ution
Cassette Lead

47.EJ7G Bylcs

3fl»40

. 34OXZ0O
Included

joystick interface for ORIC-1 El 4,95

HALF-PRICE

VOUCHER

BfiRg this voucher to your local SPECTRUM
dealer when you purchase an ORIC-1 48K
and it will entitle you to purchase the following
4 titles of software at HALF PRICE!

Multigames

ORIC Flight

su

Chess
Zodiac

106

Model 'B'
MICRO

ft t3Rt -rtWr WSfc, K*-- i^B-^ ■■«*- *-**■- ^ 1 ** "^ '■■ ;
■: t*i« *«-■■ 3Bft- *fc- -*^ ^t- '■-i'

"-"•"' •;-' ■"■ ■■*"■'■

^MWll^MHiU^^.

: -•■-■■ —

>

Yes, th is top se II 1 ng M i ere sysle rti

is now available from your local
SPECTRUM dealer -the BBC
Model 'B offering 32K RAM plus a
full back-up o? peripherals a
software too! It's an infinitely
expandable machine, uteal tarthe
home or business and is already
widely used for educational pun
poses in schools -so the chances
are your children may already be
well familiar with its operation.
which must make it the Ideal
choice for ths home too!

Now available

IKON FLOPPY TAPE DRIVE

for the BBC The ideal alto-malN*!
Spectrum ^ __

Price LIZ^D.jCO

QUICK SHOT JOYSTICK

Especially tor the BBC
Spectrum Price El S.95

SPECTRUM
PRICE

£399

.00

INC .- I

BBC Single Dish Drive 1O0K

C2SS.QC>

SBC Dual Disk Drive 800K

EB03.eS

BBC Tape Recorder , ,. ,€.29.90

Acorn Software Cassette baaed

from ES.ee

Acorn Disk b**«d sotware

E11.M

BBC cassette bated software

Item £9.05

Please note! we mgnt

ttial there is a shortage on all BBC
equipment plea.Be phone you near-
est Store rjefore making a. journey 1o
checlk Stock pg^itipn

SHARP MZ-80A

FREE! %

G75 WORTH j
of software, *

,\ ihF.-eis H28DA d
pucchdsed ^^^

£399

f IOp<py D^»k» mil Arc**B*>'i»*

hrRHM

twin rioppv Ota* L'n I

Disk cabnet

Twin Drsk Umi ICintyf

Ringltf Hopoy Oi^l* IJ^'I

Liable for f 'fi D'!**

Print* r* ind *cc»ni>r|*i 'O' M?-HOA

H/ HOH K MZ-eOK

SO- Ccl Tractor f-e«-d Pnnl»r mc

Cahle 1 IO Cai^l » Him C431 .25

D*»k tap gvniuBt tne all-inun*
SHARP W2-BOA. Ready ^O run trie
moment you get it home. Built-in
keyboard. CBT B" d!*plHy artd
ca»3«tte d»ta itoraaa wiih- 4BR
HAM. The EiASIC with extra us#1ul
additions, offers quite B- powerful
micro ior I he ham* or busifless ■
4K Byte ROM 4BK Byte RAM - 2K Byte
Video RAM ■ ASCII profiled key-
board • numeric pad ■ 2 Page Video
RAM allows screen to be scrolled up
or dawfi ■ CP.'M available.

1 • ! ; c ;n rt

caoa.as

£62? 60
E27 BO

SINCLAIR USER .StpretttlKr 1983

SOFTWAR

THE TOP SELLERS from

American games forthe U.K. market from
leading American software houses

S^iS "' 1 - ■ ■ w« J™ ?" ** vm a»>

IVAWli I HILL duUW tllOT iaach gamcl

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V^ayL^rsimCiinitUiCass! IH.5B tm* «■■« Hn£™*«

BRODERBIIMD C*SI1« iVrtli :■ I- -lai |.?isk| IEZ.17

Chadilin & J ari 'Owl mM LIGMTHI NO SOFTWARE

£*M?M»ifl]Mo :: wj* ^ erT> ™* ari|Disk:i mM

S^to AiaMftaki U4TS Wt WW teW (Gail 110.71

g -. „ ,:; ;' .... „ . jStS -v we ?Li (Cass) . no.71

■igfiJesopKam PROGRAM OESiCN

"'^'*""n™* M . . . UI.TC ft*^M ft** Atari (0*k} tll.ll

DATASOFT - 1 -' 3 ••■■■ ll«.*r

aiMar Alan !Dski ui.it .5' >C,( ^m ,, » ,, ,■ ,„.,

EDUCATIONAL SOFTWARE »f " ** *H* " llsl " ""

TncKy T uinnals 1 1n 6 Atari iDisk- . .. Lflt.lJ L'fi... -,. . .„_ ■ • "'■*•

I Per the Q'l * ltB ™ Um-LINS

UPVX/AVTQHATEP SIMULATIONS SS&mLF* &«

■■ftr jfl If'jfcrtl ifl? Ti VIL ™ i. L "* , V ■ - ■ ■ ■ ■ t*J.J»

teffl (Cart) . L1Z.7S '! n ^ h J;-, fl v=J -•■•' mis

S> hi ir»*i film Btwy Mitfltoe AW (D*S*J EII-14

SbWcS6<cSw E4K BnoOMi lrfliips A1.V fC-fkl ESB.1S

BmtUiCttll .. ... U4.ll insnarrkolnHMostAniaimn^inq

WaiSaSSt £24.11 «*l""9 ■ lJ!1 *

The TOP 50 from

MICRO DEALER UK

MATRIX

The best of British software from leading
British software houses

M8££it£*£HB

_^n

<&w \

r V 1

^W pipwwwpwr

fc ^riH'JIIII.UlMI

ZX-5PECTHUH

niMCKRii va ->fftnnM"

tun

LLAMAS0F1 "GRlOHUKMEfl 84"

L5.I0

MJICKSIlV* "MUAPIAHF

Ef 115

LLAMASOFT "MUTANT CAMELS".

E7.B0

DUICKSILV4 ■VEUKIB'S LAW,"

LB 95

INTERCEPTOR "CRA7Y KONG '

nod

QUlCKSILVA "3D STRATEGV'

LI-9J

90STFHN "SHAEAWFAX

E7.M

OlIlCKSIiW "SMUGGLERS COVE"

TBI*

V1CZO

IMAGINE "ZZOOIT ....

LS5B

LLAMASOFT "MATRIX"

ESOfl

IMAGINE "ZIP-ZAP"

LS59

LLAMASOFf 'GRID RUNNER"

E 5.11(1

Ill Tl HATE "THANZ AM".

ISM

IAMA&OI ' 'LVLRZCNL"

tseo

ULTIMATE "JET PAC"

15 51

QLIlCKSlLVA-SKVI'AWK"

tI,H

ULTIMATE "PSSr

IS .51

QWCKStLVA "SUR.SPftrF STRlKFR"

E795

ULTIMATE 'COOKIE'

LS51

:NTFRCEPTOR"tHAZ\ KONG'

LB.IO

MELEHJIJHHF HDUSF M-B TERfWHMCTL'

BBC

LB95

PSlLlrf "VU-CALC"...

EI4H

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Ll.fls

PSION- "VIJ FN F"

EM.JS

MELBflUHNE HUUSE "THE HIDBBr'

LI4 9>

QUICKStLVA -&LfcH-AHr'

F.14.15

CfiYSTAL COMPUTING 'HAILS OF THIN &S"

CJWCKStLVA "MUSIC PBOCESSBR" . , .

LUIS

Lfl.51

SOFTWARE INVASION "3 D BDMR ALLE V "

NEW -GENERATION "KNOT IN 33-D"

L5 9s

E7*5

PSS" UGHT CTOF"

tui

fllGlTAL FANTASIA "WIZARD OF ACKRVZ"

OUICKSlLVA"IIMb&ATb

EI.85

(015

DUICK5ILVA "A IRADER TRIlOGi" . . .

£1.91

rjytCKSILW "PROTECTOR"

E7.I5

QUICKS HVA "ASTRO BLASTER"

POSTERN "SHADOWFAX

L7.ll

OLJICKSILVA-FRENZV"

14 95

DRAGON 32

R CHARD SHEPHERD "IRAN SYLVAN-IAN

SALAMANDER "ORIDRUNNf FT'

17 .»

TOWER"

11.30

PSfi ATTACKI" . .

t7.I5

MiCROEPHERF OMHICALC"

M-4S

5*LAM*NDER "DRASON TREK"

t».is

PICTURESQUE '•b.OlTOfl.'ASSEMBLEr .

1151

OHIC

PICTURESQUE "SPECTRUM MONTC-H" .

(7 51

UK SOFFlVAflf XEhtrjN-r'

t»iO

COMMODORE 64

I.IKSOMWARL >0 MAZE"

17.50

LLAMAEOn "MATRIX 64"

E7.GB

P&S "INVADERS'.

tftlS

LLAMASOn".AZEHZ0NE"

£7.50

PSSXFNTIPFDF'

ta.»s

CDnitlBd hv mem Dealer UK. Dnlributirt of fitl-selllig Micro Ctmpjler Software

Plus!
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from these top British
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SUNSHINE

Cr-Jisinfl i Ufaavi '.\ '.' i II H

Cnjising \i% Wfrum; UM

Blind Alley I2X Spectrumi M«

Android* (& SpKtnmi U.H
nalaiy AttHh fzx Speetum 48K)

. U.H

Sward Fi?iit UX Spedium) U.H

RABBIT

Cvetong - QmiMdm 64 IS. I! Patiac<Mia Vic 30

bscspsMCP- CVnnwfmU CS.II ; B*w Fun- Vic 2$

Pakacuda - icmnodsi? fU LS II Mi-HltMr SJHafl*

Pjrsirjopw - Vn 20 . ».ll He 3D

*Kli|tlJ|ar

- Cawiodi!) ft &i

CtElara Vic 2B .
"lieCatw Vc 30

L5JI

an
tin

COMPUTER RENTALS

Wgii ResoEjtan iZX-EI 1 tSH

fiil:u:ii-; ftkni iScectr^ri -fiK| fJ.H
Fir IptLlru- 4tlt

Dar&y Day k.is

Rescue £1 Is

JaftktHl (4 t»

TESlrnatefi
H.nu ;

30 Qeaerl f'alrnl

Si Gwrje 4 |h« Dragon

JChaODii 33)

MICRODEAL

Altiifjj
Ll-M KatopHir AnacM

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SC4Sn*d(Z)t81)
Sgac» lirradar j (ZKS 1 :■

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MaEl*icr?=,L 'lic«1iuin
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EMI
lnli!K)tit.'iiij SSfflni'Ti HatforP
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Tre Aapla II 6 r-Mraniritr^

Handtn* tin. 15

Pw* 1 " rv "'a ^ili Grac<" 1 5 !5
TIhj Dragon & huw |o niah^ 1h;
ITOS1 ar . L5.IS

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Sinnlo Inlarfae-nj Prgieutstl H
TUI 99C Mid* An?ruA-iL

■it. tits

&rl1:«!i-- Q4 [iMipiriinQ ti.M
Irs- :)nn-1 and ha* to gel 1he
real Iron 11 . ii 1 b

The Draton 33 bw* ol qamn

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21 Canes for 11-e BBC

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T ip fVnrting Spec:rair tl.ti

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ELM
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Dr^iiw ^? CisTHS Masrer li.iS

thg A:n-:ini; Cc-iimffllO^ &4

. I5.M
tamirtrto-f M Machine Cc*

Ef.H
If-H
ESIS
ES.K
ELK

tiH

HM

LSI*

IIH

15.15
LS.1S

tbanr

The 'rttanfjqfl Dragon

Tl* 'Worhmn Speclrun

thE VtakriM Cfl-M 64

Oacffli 3? GamR Master

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BBC

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IJl.ii5.ilnl In 1fiK Spffitum
PRENTICE HALL
Tin.' AppiO hersooii Cff1i|:i.li:r l,:i
Bcyinners II IS

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tttii

HAKIC Pliwaniming mi me BBC
Mcmcranpiiiei £| H

Tlw ZX SoKlrun - Vixn
Personal Ccmpnler (5 |S

CommoAp* S4 PiDonrnmef s

;: .-*':i .e Gu* EM.lt

"v- r*r' p ? r:inna Cmpuler r»
Begmners U.H

VI-. !U Hrogramme/'s WtaMH
JJ|*' . . E1.W

CMornl Usnr's Du<Ss 11171
Ther C PM'sgrarnmrkg Lamuaofl

III 14
Starting FOflTH ilfl.B

ACCESSORIES

G« DAM CASSETTES 10 »

C15 DATA CASSEnES . « M

VISCOUNT SINGLE SIDEO DOUBLE DEtJSiTY 11 0| <Km APPLE

C0UM0C0RE, ATARI. TANDlf| m .»

VISCniJNT SINSLF SiDETJ SIH6LE OENSITV tlO). . Ell . IS

VlSCQyNT MU8Lf SID to, OQllBLF OENSITV MOS (FDR SMAfiP
SUPLfl BRAIN ETC) LJ] ||

VISCDUWT -&IKJGL6 S UEL' DJURLt 0EM5ITV 96 TRACK |lDl fFOR
NASCOM COMMODORE MHO FTC U1 »

EWP^ DISK CASES (FOR 9k" DdSKE TTFS'i tt H

DISK HEAS CLEANER KIT £11 It

rumuMi

1?' TOO !15W PORTAHI f hi h

CTPnar 1 a" colou 5 ! pohfahi i tai n

M

Teach yourself BASIC
cassette available for most
popular micros ■

an £4.95

count

TURN THE PAGE FOR MORE SUPER OFFERS FROM SPECTRUM

IjMVlPbPU ^ainiiiiMl CtriErW. hdri ■« -innnielinii ^HHMTW-r #Th ih* ZX ^inciFiifTi COTOPu^Li (T^tu ftttijeytf t^- E^iclair ^WPbr^h L id.

SINCLAIR USER Stptember 1983

107

SINCLAIR

ZX SPECTRUM

This top selling micro is now available from
Spectrum in both 16K and 48K RAM.

.iiiiiiiiii
mmmmmmmmmm
mmmmmmmmm

; flMB HP i5Ef 33* 33B

SINCLAIR

ZX SPECTRUM

16K

£99.95

SINCLAIR

ZX SPECTRUM

48 K

£129.95

Spectrum Computer C&n1res riai/e no connection what
Soever with the Z X-Su*Cl*u ffl Compute r manufactured hy
Sinclair Research Ltd.

Just look at this fantastic range of add-
on goodies for the ZX Spectrum!

WSCOUNT 32K RAM FACK. . . .
SPECTRUM/TV SOUND UNIT

Control sound ai yuur
IhtouQM volume coitrol On T V

Fuller THE

MASTER UNIT

Corr-bincs all lHft 'salufftS

c- bolti ORATOR and thH

rijLLLN BO* at -tie amaz

ingly tc?w prn:^ mi

only £54.95

E39.95

ORATOR VOICE

SYNTHESIS

FOR

ZX SPECTRUM

ONLY £39.95

Fuller

16K RAM

ONLY
£24.95

7*-Spec:trum
onfy C3.95

AMAZING

FULLER BOX

Features; Programmable

Jiyunid. Joyiflc* COfl-

trodler c;.ift! : .i=!':lrt Interface,

iieee. Am pi ifle', T hro Suae,

Volume Central

only £29.95

Fullvr

FD 42 KEY-
BOARD FOR

zxei

SPECTRUM

ONLY £29.95

Fuller
SPECTRUM

SOUND
AMPLIFIER

ONLY £6.95

DIGITAL
TRACER

from RD
Labs

SPECTRUM PRICE

£55.50

PRINTERS

EPSON

Model FX-SO E503.70

Model RX-30 £332.35

SEIKOSHA

GP-1 OOA £229.94

GP-1 OOVC £247. 25

SMITH CORONA

Model TP-1A £431.25

OKI MICROLINE

Model 80 .£259.90

Model 92A £455.40

Model 93P E585-35

All pyices include VAT

ZX-S1 ACCESSORIES

64K RAM Pack £54.95

16K RAM Pack..,. £24.95
ZX Printer .£39.95

MONITORS

ATARI 800

Fantastic! ^^

NEW \
LOW/

Price ^

■■.----...- : ;.. .. .. ..'. ...... : -■• ,..,;..

Now in ie proven and 1es1ad mach-ne has- teen upgraded 1 to a massive
4SK RAW and .Is Still M ih& muirvg LOW price nlE2»,95 trWB
SPECTRUM, 11' 5- an deal Home Micro for qraphics. educational and per
sonal Fina nee ate. use il and it wi II lake vou Irwii I aarrn ng up to a sma I bual
n?Ms MM. Y<iu r.an add printers, program iwafdafs. rti*k dtfvMand mot*,
!o eKpa n<J ■■/our m icro as end wtvg n yn u waul, to ami you r needa. &o if you'ra

if.ii-.kiny lr:r ;i I CD oi |tl* liilfi micro yf>u mull hi -^ Ik i: ATARI BOO svHh *SK Bl
SPECTRUM - WOW!

SUPER
NEW
LOW
PRICE

£274

.95

ATARI 400

16K RAM

NEW LOW PRICE

£136.95

Including FREE

Programming Kit

PI u* a wide range ot other peripherals 4 sofrwara for ATARI from
your loci I SPECTRUM deoler - Sea our SOFTWARE page"

DRAGON

^Incredible* ,

f Value- 1

1 for- u
Money!

W"WlP#t*

SANYO COD
3125NB

Colour Monitor

£286.35

SANYO 13"

G^een Monitor
£1 1 3.85

All prices inc. VAT

THE PLUG

Ever had your micro crash on you
when you were in the middle of a
complex program because some
other electrical appliance was
switched on and caused a power
fluctuation? THE PLUG is designed
especially to overcome this
problem

only £1 4.95

Extensive facilities include
highly advanced colour
graphics. Powerful stand and
32 K HAM (expandable to 64 K
Bytes). # 8 Colour 5 resolu-
tion Display A Extended
Microsoft colour BASIC (as
standard) A Advanced sound
with octaves ■'ESS tones.

SPECTRUM FACTS
Maximum u*ar RAM

, 2»,679 Bytai

Text S c i een 1 6 x 32

M ig h re solution 258 ilffi

Cassette Lead Included

VISCOUNT T*eeh yourself
Draao" Ba*Jc £0-95

CHECK WITH YOUR LOCAL

SPECTRUM DEALER NOW

FOR OUR SUPER LOW

PRICE

PI us a wide range Of other peripherals* software lor
DRAGON rrom your local SPECTRUM dealer See
our SOFTWARE page!

3titK--in.ni ^cvtiFmieri 0«il nh fuWU ITD Dar^cClton *MhH30*VCI tSnEh ihf Z X Sp-KCrJiTi ContpjWT rTlflnuPlClu'Ed tH|> Binctirf RtMBrch Lid.

1U8

SINCLAIR USER September 1983

There's a Spectrum Centre near you

PAIGNTON OSmn ContoHris. Bl Upper
Manor Rp T tv 08(13' S2B3D3

BATH Stftviare PUN, 13 mt St

BRISTOL Snnul Lflmputt/s .in .
If AA MHTG. I02T2. ■ 2J41H

WEgTQH -SUPER- MARE K &K.

OaspulBn. JS Airred SI TEL. TEA

BEDFORDSHIRE

BEDFORD 5:* jd I Id 1 15 Mipljinf ft)
TEL 1 0234 1 49341

DUNSTABLE OormanE, ,' 11 Brow rt's 1 -
TFI |<HB3i656IE

LEIGHTOH BUZZARD Th( ComputEl
Gantra al Midon Kaynes Music. 1/ Bridge 51.
TRIOSSE 183504 3T6S??
LUTON ttrHMR, fl9 fjfoqd St.
IEL: 0SS2I 2330 1.-2

DERKSHtRE

Hall

HEADING Dmd Saunders. 9 V
PlSil r LL D ''34! ML" 19
WINDSOR Wf tombs J deo. 44 King
fflpjifl CaurL TEL <07S35l 97441

BUCKINGHAMSHIRE

CHESHAM Rnd P-hUnjrapsyi
Dompuun. - i3HlnhSI Til ;MMi7Ban7n

CAMBRIDGESHIRE

CAMflAlDGEX Plld 15ikiigj*aradc
TIL 'K33. SS«7

PETERBOROUGH PaLertmrough

CMRMlcnHw. 91 HUlwe Rf
TEL G7S3i*WW

CHANNEL ISLANDS

GUERNSEY Gnu's. 3b TUB FdIIbL Si

"iioiPvn TEL 104*1' 24692
JERSEY M* fctwputrr C«-»1ro,
.' Pster 3t St Heller. TEL .'DbM: 74GDD

CHESHIRE

ALTRIMCHAM Mr. Micro. ZS High SI.
TEL TB* :Phontirj61i 728 2202 inr inln.i
diem Hitroum Unit 2. 128 Pta-itmch Kd
"U |C127Bi2IEuT4

CHUTin aakleal Computers Lid.,
lM Sondlnn T EL i Q244 1 3 1LJ099
WACC LESFIELD Camera 1 Computer
Qnnrt Hi Mill St. TEL ,0635 ?74fl9
MOHTHWICH Ciriierft J CemitMlgi
Canira. 3 Fswn S,c TEL. idE4)6.i 46d2s
STOCKPORT WMaig Ltd.. ■ LJUa
Jidirbulk TEL :WI|4M34S5
WARRINGTON Hading; 111 Bi*jr Si
IH Il392b JE23B

WIDNES OHiputar Cit) /BViHnnaTd.
ITL IB1; 420 3333:

WILMSLOW Swift « MiMsHmi 4 8 Si
butt Prate TFI |iPC?5i 5?C31S

CLEVELAND

1HODLESB ROUGH «::Kf rlnj Jt B-™ -
:« Llnltnype FU TEL :Ofil2l24JI34b

CORNWALL

ST. AUSTELL A B 4. C Computers. Duchy
HOK9B £ .0«*-A|lmm-Sq TEL i'D/ZGj 6.UB3

CUMBRIA

BARROW-IN-FURNESS diTOW

Carapulri tartr*. 98 CIlcS- Si

TR |IJ?7Sl3W5J

CARLISLE IheCflUHlttr 5lW# 5B--bB

Lpwlref St ltL:.:0C2BM2 7riU

WHITEHAVEN P D Handran, IS King 51.

TEL IDWCI 2063

DERBYSHIRE

ALFHETON Gdwi HarwDM. 89.71 High
SI "FL '077,3; B32U7B
DERBY G r Flicti-saics at Camera "hoi pa
TsrSp* I EL 103321 3S044S

DEVON

DURHAM

DARLINGTON MtKnu t Brown
102 bpndgilfl. ItL, ID325I B9T44

ESSEX

BASILDON Codlirjyi 28-32 EtM Walk,
'WwiCdtre TEL 02EB.2B9375
CHELMSFORD Vion Hayman I tri
Li Emomrield Rd TEL 1 02-45. 354595
GRAYS H. Rffjnslds. 78 OrsaH Rd.
TEL 0375 5940

ILFORD WuoirmanE. ,'B llrord I ana
TEL 1011473 13Q7i Opening S*sn|
LOUCHTOM Mem I mm Channel,
309 High Rd. TEL QI|B0!1 1715

BLACKBURN Ttnpc- Computers
9 Bail*3> FrJ. TFI' rK"S4 RDS54
BURNLEY I HO CnrnpHsr Cedum. 38 '43
SMIII SI . BB1 1 TAP TEL .;02B2'. 64293

BURT (LarKa.| Mlcm-Nwlti, ; Braid St
TEL: |Sfil! 737b7l64

OLDHAM Home i Buslnuss Compilers
lid , B4 *irts*»B St. TEL i06i;.6J3 I6TJB
PRESTON Wildings ay-isi-.irflHE-
TEL: 10^2. bbfi!5B

ROCHDALE lame I Biriinnsi CumpuHrs.
TDiYDrkjshlraSL TEL 1 HA

LEICESTERSHIRE

LEICESTER VTjunp. 40.42 ETEtlW S1.

TEL .9533! 644^4

MARKET HARSOHOUGH ■l.iriujruuuh

«■«» Computers, 7 Chant* 51.
TEL.lOSBBlHDErtj

GLOUCESTERSHIRE | LINCOLNSHIRE

CLOUC ESTER TneMudelShop 7B 31
telhgau Si. TEL: 'Otta.i 4 I0E93

HAMPSHIRE

ALDERJlUDT Ohio IWMtn, 51 Stalinn
FH TEL:92S2i20l3O
BASINOSTOKE Eishar's. 2-3 Harnn
Place TEL iL>2b£;2?07S

PORTSMOUTH "i;mpi:ei Cuinei 281
's.T\Te r: al fld TEL: i070lil S33Eltfl
PORTSMOUTH WBIorlomlll* L, li
Mlcigland T Queens PirJe TEL 07014153911
SOUTHAMPTON fl J PjAjt t Sw Lit.
HHnrtmnuihHd.- WrnHHnn.
TEL l07u3l43413 7 /8

WINCHESTER WinchostcCimtf* t
Computer CsHrB. fEi Pirehnant SI.
TEL' Ifl9f 2i 539*2 i,l(5t Dpenip)!

HEREFORD

HEREFORD M^i^-.iv ll> "h;:i- I il 49
ElrnadSl T£L. I0432I mi3r

HERTFORDSHIRE

HATFIELD Micrewnrld, 2 Crnlord Rd.

rELi;070. f 2:E4IS,'

HEMEL HEMSTEAO FaimlnHar L Id

Crirtfmlcr i ElBclnc* Discount Cenlra.

2b Marhel Sq. TE1' :fl44?i bsn44

HITCHIN tinflfi nil Mlr:re {Emptier

Dwsnfi. B8a Hermilaga Rd.

TTL ilKB7:592B5

POTTERS BAR Tilt CompulSr SHOP,

l97Mij4St IEL 070.'.. 4441 !

ST, ALBANS (Hertt) tlartu Cqmpubf

Csnirrj 14--1B H.lljmcll Hill

7EL:i9727lS2«!

STEVENAQE B J. Eompulara, 11 l..v.u

Sa TEL 'B43B' 65601

WATFORD SHS Mcmsf stents Ltd.. 94

Ihs Panda. Hiqh 3r TTI iBg?Ji2fl6D2

HUMBERSIDE

GRIMSBY Ft C. JDtns« Ltd., 22 rmancjle
=5 vmiIihju Canrfj TEL HJ472I 42031

ISLE OF MAN

OOUQLAS T. H. Cnlahdum Ltd..
57-B I Ylciqria Si TH i0624:J482
Uasl Upenlngi

KENT

CANTERBURY K«M Miort Srtlams
Cdnqiirsl HtKit 17 Palac! Si
ILL 1 022/. iUQUD

ORPINGTON LINE Markahnq Lid.,
25Slatw>Sa Pulls tint TEL 06B2 394fB
RAIHHAM MicmwarCpwpiters Ltd.,
BJSI^I V. MufaHHf Tihwitj
I EL. 1 0631, 3^6/92

SEYEHOAKS Emast Flaldar Cnmpunsrj
tarscfSl TEL I37S2" 4&GS00
SITTIHOBOURNE Onmpulan flus.
fib High St ILL OfM 2BE77
TUNBA1DOE WELLS. Hn^ra
Cumputtir.i LK 20 30 51. Johns til
TFI DB»2 41b«b

LANCASHIRE

ORAHTHAM DsfclHi' Orjmpuicrs Lid.,
121 9**y Bd TEL: id4 N i f 0904/ 7B2BI
LINCOLN MM Computers. 24 MewU.ids
TEL:{0b22i2bSa7

LONDON

E« ^rcivalE, OB HHjriit. Ndrti EaslHan.

TFL iBi:.47?B94l

ES Hctmurt! ?44 nmivj#fld , Hackney.

TEL r01/S33 0936

EC1 Ihavrnn Compotar Canti* lit

MODigaha TFI I01I 639 333S;1S30

Hi 4 Ljqlc Sales. 13 The; flruadway

Tnt Boamd. SaulHada. T EL: IB*

HiO Cas-llahurst Ltl. l2il High m

tti ■ n i 44f. ?;nr

NW4 U g,,,.:, CdnpuuErSldre, TH Brum St

Handnn. TEL: |0l i 202 2272,'3/4

i.lnsr rj[«n<vc;

HWg MliMIIIMI. INI Kingjtdri Rd.
lLL:Hlli2{14 53b3

SEt Iftg OddM's, 6 1 niidon Bdg Walk
TEL: |01 1 403 1989

SCO 5quari Deal, 37b FoatiL-iy lid ,
rtaurimam TFI mil 969 lFjie

SE1S CiilMursi Ltl 15? Bye Lm*.
H!-:n>iair ltL:iUVB39 2:tlb

SWeChalsaiMnros tic 14 JenJen Place
TFI ;01i3K9494

W1 rjet-iQ" 4 EdgYRts Rd.

rEL:.:01v?24 23r3

Wl CoaipoterE o1 WifniHie Street,

97 Wigmore St TEL rDTI 406 0373

Wl Sue Fdlo i Micro Canlar. 2S6

iHUHdJB Ch1 H. TEL. i'Dl . &BD BS?fi

W3 Ljawmilic i;ompnflrs 44 High 5.1

S*ldn.TEL:|OH092 7«ll

Wt1 Elcctrtwsura. 12Q rtelhng Hal Sat*

TFI iD I; 73 17D2.9

MANCHESTER
GREATER

MAMCHESTER Lomat Lid.. II EnAaagi

St, SI Ann's Sq.TEl:(9ST| 332 6167

SWINTON Mr Hicre Ltd ii Partmtdn

Lue.TFI (D#J1|73B!282

JpEnl-'iUv untr.ap.m.

HYDE Pan SIS-SIS Marked St

TEl :06»: 366^935

BOLTON Wilding I Id . 73 *HWW

1EL::03U4I33BI2

WWAM V) Uinq L1d.. 1 1 Mesnes St.

TEt ;OS42i44342

MERSEYSIDE

EXHaOLTTH jiw; "1 M .IF T > Sl^nil

TELiO39b2«0fl

ACCRINOTON PVCoMMieis. 36ft Water
SL TEL 1 0254> 3S52 1. -32811

HESWAUL Thumquard Computei Sy^lems
4B h-enedy Rd. EEL: IB&1| 342 ,'blE
UVERPOOL Beawr ibsH. 24 22
WhiljK»apBia-TELiD51i709Q3M
LIVERPOOL (Almnwl Htrr^avas,
31/37 Nktotti MODI TEL '0511 525 1782
BOUTHPORT Cenlrj. CwpuSerj -575
Lord SI. Ill IBKI4' J1B3I

MIDDLESEX

EDGWAHE Hnaaaar hi. TJOfliaJi SI.
TEL: I DH 9S2 7489. 'SBSO
HARROW Camera ftrls i Micro Compute'
Di'jiSuin 24 51 (Jin 5 Bd. TEL |OI! 43T &4SS
HAYES HhlpilOp HMD II iBfida,!! R0.
TEL: |0l 1 573 251 1 1 Just Qpcfoqi
TEDDINCTON Tecamplon Camei i Crrlrn,
Bni.iilSI TTL H0I.977 471B

NORFOLK

WOKlNOHarpertJl/TJCa

ItL i DtflK? I C IDE I

arcial <*i f

NORWICH Sound Martaung, 32 &i
BdnadctESl lEL:|0Boai6577?6
THETFORD I SelMrd C B A Hifos 21
Guildhall St TEL i9647lSlG4£

NORTHANTS

NORTHAMPTON ajac CPmgvigrs &
Svilaeis lid . 77 Kingslhufrre HdIIh
TEl :0E04 1 710740

NOTTINGHAMSHIRE

HOTTING HAM CjmaoCdmpuUrs
B/9/101rmrtvWalk 1(1 >TJ637: 4-2912
HOTTINOHAM Basic .19-41 T;;-i
maulemird, WtjSI Bronte**
TEL:iD«12;S19'.M3

NORTHERN IRELAND

BELFAST ftrlhur BOOEOn Hi ,37C1.
VicrsntSt. IEL (C1237; 24693*
LONDONDERRY rcyle CMprier
Syslams. 3B5hopSt. TEL i9SuU;.26B3S7

OXFORDSHIRE

ABINODON IwrftaWCiaajtitf*
2! Start SI. TEl-iO!3f)2T2ri7

BAN BUHTfonptlcr Plus. 2 Church Lane

TELinaejsMat

OXFORD I iw Fields. I St Fbbai Si
TFI :D7Ki21f(J7

SCOTLAND

ABERDEEN No^h East^oaapitrs

l-srills5l Pem>«4 TELlQ77»i79uM

DUMFRIES VfinntJi 71 English S1

TEL."n3B7:.Ai4.?

EDINBURGH ihBSilicnnLsnlre B-;

HangiiaSi TEL 1 031 1 557 4MB

GLASGOW WbM Mprns LI*. 349 Arfyla

31. TEL: !041' 22 1 9968

HAMILTON Toa nichson C*mp»4nr!. B ■ 12

CadiowSl. TEL (069B i 283*33

KILMARNOCK Annals, 49 FdiBgala

TFI .0663:' 32176

KIRKCALDY Kirkcaldy PhijIcVaphic

Sdrmas. 254E High SL. Fits

TEL: IBSB2: 7J047M

STIRLtNa R. Kllpsnilck 56 PW 51

TEL: iD7«6l 5532

SHROPSHIRE

SHREWSBURY roispittiimi

13 CjHlleoJlB, TEL: I'D*

SOMERSET

TAUNTON trail's I S' .tuntt Si
TEL :0823;. /29B6

STAFFORDSHIRE

STAFFORD, CompLlorama. && Farqatt St
tfi ci/ns 4in<ia

STOKE . ON .TRENT ^OrtBui*' jn-f
'1 Marlet5q. e-tide Hmlev
TFI :Q7B?'?B9«aj

SUFFOLK

BURY ST. EDMUNDS flury COmpulei
C«alrc. vfiuldhanat ILL.rOSM TCb!71
IPSWICH Br*rr*avB. 24 Crown Si.
Ill :MT3>5FJ9fl5

LOWESTOFT Job) VW*. 44 LpMon Rf
riDrtf. ItL -»b02<3i'42

SURREY

CAM BE RLE V CaiafriArts-B*ejD

r*n*eler rjiviswr.., 30 High SI.

FtL.'92f6;.6BB4E

CHERTSEY Chflnsay Cflmpuifr' Canire

I Windsor Si TEL .M32B' 646.63

CROYDON CjdKiii Lid.. 98 Whdgir:

Centra Neil dnnr la MstFXmM SI

TEL: i«l I 6838393

GUILDFORD ThaMaSelShop iSSwi

L«H TFI i90772iD48339l!5

HASLEMERE llaitomcn Cranters.

25 Junctwn P«« *I». f\a Cinema
TFI :ll47Bi544?3

NEW MALOCM Sirrei Micro SrsHms,
3 1 High St TEL iUTi94?!J4'B
WALLINGTON Surras Mlcm Spleen nil
h3W«diyeFi( TEi .lp1.«4TB«36

SUSSEX

BRIQtfTON Caprtor- I Uueans Fid
IEL 1 32/3 1 39624

LITTLEHAHPTON dljn ChiH LU
39 High Si T(L I09O64: .58 H '444B

TYNE & WEAR

NEWCASTLE -ON -TYNE «*»tnric

Chwi h Cnmpular Mm. 16 i*orlhumhBr1i«
Ct TEL lOFj3i!32r4Bl

ABERYSTWYTH AterOrta al Gallmiys.
23PiarSl TH '03, r a: S15i2J
CARDIFF AandallCu IS/2? rtijn S:
ftfcaaa TFI n3??2l3i96H

NEWPORT (Uvvnl) Rintal Cm 119

Ct-nmrculil TEL lflE33lBT37S
PEMBROKE Randall Cm 19 Mam SI
IIL BE4iB6B287C
PORT TALBOT Mlcrn Sen. B flm*
Bund sgs, Talboi sid TEL: |OE3g.i BB7730

WREXHAM 1 E BiAani 26K«g SI
TFL iD979l364404,'334627

WARWICKSHIRE

LEAMINGTON SPA It Lumbers 13
FIUSSBIISI IEL iQ92Bi 36344 timing
SHn i

HLKJBY TBn Rugrjp Micro Cdnlra, a 1 1
HugtrilSI TEL id 7-HH ■ FTJ6H

WEST MIDLANDS

BIRMINGHAM ^nrmSOK 81 WeElam
AiCHX TEL. i02li23fi r2ll
COVENTRY Covmry WcDCanrr* 33 Far
LtoSldlCSl TFL -DJD.-i brV947

DUDLfl Y Cam p>m W*dd. 3* Church*
Pretmr TE-, 0381 21B IBS-
WEST BROMWICH Ball i Jmi
39DuHdS3d TEL '02 1 . 553 00 21

WORCESTER

WORCESTER 0a*id Vtwm Lid.

I Mi-mion House hUtH Si TEL .0905:27561

YORKSHIRE

BRADFOFIDFii£4*ir.pD Same House
BawsonSfl TEL illJ.'di 305IEE

HUDDERSFIELD tcaards Inrmilii
Lawss. I J Queen 5| TEL TRft
HULL 1-* Ciimoun- C*aari Humhersidei
Ud . 2t Aiiaty Bd IEL I84S3I 3E397
LEEDS Uses & Bligh 4 Lwwr enqgaii;
TEL 'DSJJ.4S44SI

SHEFFICLP Suptfin Syilcn Lid 1T8
Wcsl SI TEL .Of'12 ,'bMIK.
SKIPTON .«» a. Sea 4b BXnwir Rriege
TEI rj7558l»ia

YORK lifi Ca«(*rttr Curtri ' SlBMQdla
Arcade IEL 0904 M'iB?

NEW

SPECTRUM
MEMBERS

Check your area
there are many
new SPECTRUM
dealers through-
out the U.K. So
there's a good
chance there'll
be a SPECTRUM
centre near you!

NEM ill lTuMBl Chrry RwRry ^ilMarlsMlMl i-MiTi. f ilM M Cttwrw fTJCton rn«l(|nq a |OUr"jy - fVhCsjI- C-Orrnc! Ht t\rrm ijl- p^irvg stj urtHta £. ft O.f

SINCLAIR USER September 1983

109

contrast

*

USER-EUnLURTir software

ADVEHTUflE IS t AW |4iK Spvclrumi E4 S5

- *.*■.'*' Aiiirt frffl'^n rg advt p L*E with Q0O7
graphic* pnrj Kiiind nrtiKJs as yrju r'OTP arQUnd
lln-fr iSltWd laying r,r> rw^ijn a iair ntuidHii h om
WH «v|l Df Muvto, assailed by al! I'm^ner <M
deadly crerturoa— Erfr 3 - 1 ^ un - p ' yB Munchum*

— a*i 9KWfll»nt varialx- - ! a H the afGadtf Q3rn^ —
H'i'J OutNH-{in ftvr<hnQl>' nTffitritfil addictive
Chaw *irh fi scrMinH, 5 sh.il la. Hall it\ Fame. Ml
trlii^ntcnlaur and sound- .

PAWHCHE55l+«K'«K Sp«ifuiiii ^Ht

A oumptoieijr new ga^ne raUier ridn in :t™
played Oi'il> ■v" 1 pa-Wif, Injpinngly crutcrd by
>nfl6 Ol tli* country's lop D'Pfl ramm E-rs . Il'a
Ifuly addictive, whtfhp* you'r* a ch#ss player
wanl „ri£ 1-3 rqf i n ? ypi.i r pa Wn play, nr e bey irn-er
who 1ir>ctt1ti(i lull garni} tro invnlwed. Qi-ocrae'i
vlSC*" gualuattqn n- mnves. strong rr'iylti-levtil
p-lav soi.. rd prrfldi, graph-: bcar-J ftfB— 101%
m^rh inn^rrxlfl q-mas in slant rnacliura

HANOI KING H8K SpMliLiinj £*-K

An- ing*mrjua And addlctlv* prahl*m a\ iQQirj
irivnlvinelhelranBrer nrrj.jlgyr.Kl rings lj*Ls>*=yi
Pillarn-. atari & Ihe B»mpl«H#ivBHan: y 7 rt*evflB
Id win | and prCtQ/€9f rn ih n har desl whic^i rttjsdu
a miniWun Of fil mn^flfl— 1h* mdai IflKHJdinfl,
puzzle SinCfl fUTJik't ni,Jhfl" The ubiri \i u l£' wIM
Wnfl "un lhFCWg*i aJI $11 mcvn iT y&u Whflh.
lnsLnril kje> ^esppP-M and iull sound And COOu.*
ifiaike It r&fl*ly tl^r* 1d play. RiFfi AnflJ** —
ariOL^t' phaMftng-riB strategy Sh/InS 1 Wh'Ch
beconea ir^rewingjy -d.H«uii.

M.CfltfP^ilSK/MKSpMlruin. E5.95

AM t**e hpaturflfl yau flxpocl hmn a powerful
r r C Ifl3! v*ial ward pracEssc rui 1BK ur* +BK
5^C"-"un ri « r*iti cursor editing wiLh Buito-
malic paragraph r-iriar matting; atrOll up, down
and" reposition; search I'adi I A given *Prd
lirou-enwt: gplHHial jujlcimulic wuid-vi *:. ^ id
: 1 3 hi -margin |>.i3"iica;i~r: tay-e, ru ic»ad afld
!_.■ "i *vMn dr.-i.bla scrcc-r Dpi ion. irtftiani recall
<)4 initrydlDtvc MithDul lass lI Icp!

TEKTl1»KZX*t:

Ki.Si

Trana^PrrlTtyOur ZXB1 Inlo- an lnc.r*cSlti^y vnraat
i 1 * #ord ffooe*sor wilh ^4? pnwnMm, iDQ%
nacNie-»de P'&arsn Arraring stlflrtici n'
15 C'f.-Krefrfi "O-jiiirifts r-.-l.idc all the usual
fid'l""ig and .^-Sli'vng 'oati-rcs ^lus uselul esi'fa
tunctlont nk-fl March -and '-D-place, "rioviny
pli^kg, <nt tni1 arnund flic. Ca.^aLilv up li 350
I r{] i ' l jnr.,; .-.|-a.-*clr-m ■ FuMy sr^K^endeiil
Irjgd aJid sa^fl iTincdialc accnt; i.j "help"
paga rnakoi it al I easy

THE SIEGE OF FORT AFACHEMBK, ZXat i
Defend your fe/riaor. agalnai ma-'^uain^ red
Indians by ski'Mly deploying yQw tr^inps and
aihrr unHtoe. leat-ur&es Should yr>u gn an dj 1 :
liEtr an attack And lea.Ve :he 1oM undarr±inirxJ7
An unuftual 4/ld Bilmulatlng MJv*n1ur« which
rca ■? k*«se-yt'U u""> >r. ic' lnflfl.1 C4.9B

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Evtr nun-mid pljyt'H *v I LiiflLihlv Lier-j-'he
atl JicLed 10 1H1»! Your Spfitlroni is I Mi doaiu' it
Lhn <pafne aloO ki>&wn da vi»Qt-0L-Lh. ur-d yOu
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luLai hwuur 21. li-^ljOifi 1j I, Cltiar ai.'ye-i

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TAP£ HUDEH READER i|1t.'4BK SiMctriKni

I [i valuable In every anlhuftiaai lor i|>3aK>ng.
mrmery Laiculatior c niniply prtppi<nci 1 he
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urani Ll«J Kn>t (his Lap*, man any ether; ty
rMdnifl' i«t Header Ifirai raw aeconda at lie
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«u*eiio loading LlTia, and (M m.'c.l 1i« ceoe
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A uflr^ Hjmd'eneiilva and yet eajj-1in»
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UTILITY iISK ZVHl

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A widfl range 'jl MieiTu-lHl*r'aied Tunc! inns sn
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THE WQflLD OF ILLUSIONS HflK ZXI1)
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:hat only programs of the very Miflhest ptnpLjifirity &re ^ C eptfrd ■ Try or*e and
discdver itseittra quality for yourself; we are confident enougli to offer a 7»day
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SDF I -A' A
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ADDRESS

Please rush me;

SU

I enclose cheque .' Postal Order lur £

SUPERB MEW GRAPHIC ADVENTURE FUR THE 4BK SPECTRUM

Full Colour 3-D Ht-Res Graphics

Scrolling lext Winder

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tstfipfl from ihft sliica.. *rf*fCM
tha barren wastes of Solaria
for the convict SBtrtement.
0-*iCe LlMfie yCHu r'nuKl win

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DEALER ENQUIRIES WELCOME

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no

SINCLAIR USER September !'J8S

Starting from Scratch E

GLOSSARY

Basic — Beginners' All-purpose
Symbolic Instruction Code. A pro-
gramming language resembling
English which is used by beginners
because most popular microcom-
puters have it as standard,
Bug — an error in a program.
EPROM — Erasable Programmable
Read-Only Memory. Semi-
permanent storage. Information is not
erased if the power is turned off in the
computer. Programs can be erased by
subjecting the memory chips to ultra-
violet light. The memory can then be
re- programmed using an electrical
device called an EPROM blower,
Interface — RS232 and Centronics.
A device which enables other com-
puters or add-ons, such as printers, to
be connected to the computer. It con-
verts non-standard signals from add-
ons to the standard signals of the com-
puter in use.

Kilobyte — (K). A measurement of
memory size. Most machines use 1 6K
as a minimum but 48K is generally
agreed to be necessary for serious, work.
Machine code — an electronic pulse
code used by the computer to perform
functions and communicate with
memory and other devices.
Mnemonics — abbreviated instruc-
tions — for example LD for Load —
used in machine language programm-
ing.

Motherboard — an external printed
circuit board which is used like a
multi-way plug planner. It enables
other printed circuit boards, such as
graphics boards and colour boards^ to
be slotted- in.

Port — a link to the outside world
which can be used by programs and
the computer.

PCB — printed circuit board A
board which has on it the electronic
circuits of the computer.
RAM — Random Access Memory, In-
formation and programs can be stored
in this type of memory as electronic
pulses which conform to a set of
numbers — machine language — in
which programs are represented in the
computer, When the power is turned
off the information will be lost,
ROM — Read Only Memory. Infor-
mation stored in this type of memory is
not lost when the power is switched off.
Software — programs which control
the operation of the computer,
Syntax error — a hug caused by in-
correct use of a programming
language.

Our easy-to-follow guide for new owners

The basic route to a
habit-forming hobby

BUYING a Sinclair machine can be
the start of a life-time's obsession
with home computing. It is easy,
however, to become discouraged if
everything does not go according to
plan from the beginning.

For those with only a little knowledge
of computers and Their capabilities, the
best way to approach the machines is to
abandon any ideas for special uses. While
the 48K Spectrum is big enough for
simple uses in small businesses, the range
of Sinclair computers does not contain
machines for major uses. It is belter to
become accustomed to the many facilities
and then decide how you wish to use
them,

Begin by unpacking your machine,
overcoming your surprise at its size and
w f eight and , following the manual, set up
the system , If you cannot get the K on the
screen, check thai everything is plugged
into its correct socket and re-set the
machine by pulling-out the power plug
for one second and try tuning- in again, If
still nothing appears, check the power
supply unit by shaking it, If it rattles,
return it, If it is satisfactory, check your
system with that of a friend.

If you have a Spectrum you will have
received an introductory booklet which
explains what the computer can do and
giving detailed instructions on how to set
ii up Also included is a fault-finding
guide,

Once the K appears you are ready to
begin learning about your machine. It
can prevent family arguments if you tan
afford a separate television set for your
svstem. It also makes life easier if you

find somewhere to leave your equipment
set up permanently. You will find that a
few power sockets are needed and a four-
way block connector on a short length of
extension cable will help to tidy trailing
leads.

When using a Spectrum, a television
set has to be more finely-tuned than when
using a ZX-81 because of the added
dimension of colour. If the set is not
tuned properly, the colours will look
hazy instead of sharp and clear, If no
coloureanbeseen when it is switched on,
the power supply or the television set
may be at fault.

Some users have experienced some
difficulty with some television sets,
which include Hitachi, Grundig and
Toshiba. Sets which many people have
found compatible include the Sony
Trinitron, Fidelity and Ferguson.

The manuals are written in great detail
and are reasonably easy to follow. Some
of the chapters may not seem
immediately relevant but it is worthwhile
reading them as you might miss
something important.

Patience is needed at that stage to learn
the ways in which the computer will
accept information. It is tempting to try
to enter programs before you are ready
but that is likely to lead to errors. For
example, words like AND, THEN and
AT should not be typed-in lettcT hy
letter.

By the time you have reached chapTer
11 intheZX-ftl manual and chapter 19 in
the Spectrum manual you should have
accumulated sufficient knowledge to be

continued em page 112

SINCLAIR USER September 1983

ccmiiaued from page '"

able to type- in other people's programs,
such as those ia Sinclair User and Sinclair
Programs, without too much difficulty.

It is that important when using the
ZX-81 that it is not jolted. Some of the
connections can easily work loose and
everything which has been entered will
be lost,

The manuals are not to everyone's
liking and if you find them difficult to
follow a number of books on the market
can help you. Find the one which suits
you best,

As a way of relaxing you can buy some
of the growing range of commercially-
produced software. That can be loaded
directly from cassette but make sure that
your machine is big enough to lake the
tapes you buy.

For the ZX-81 there are a few tapes for
the unexpanded IK machine but the
majority require the 16K RAM pack.
Similarly on the Spectrum most
companies are taking advantage of the
possibilities provided by the larger 48K
machine rather than providing cassettes
for the 16K.

The tapes can vary in quality and it is
advisable to read the reviews in Sinclair
User and use your judgment to find the
best.

An alternative method to learn about
both the ZX-81 and the Spectrum is to
plunge in at the deep end and see what the
machines will do. Refer to the manuals
when you have difficulties. You can
ignore the functions and calculations
initially and experiment with PRINT
statements to obtain the feel of the
machines.

You may already have heard about the
problem involved in SAVEing and

LOADing your own cassettes. The
manual gives detailed instructions but
many of the early ZX-8Is would not
accept tapes from some recorders. That
problem is said to have been overcome
but there can srill be difficulties.

Usually they occur when LOADing
tapes recorded by other people. One
simple method to overcome this is to
wind the tape to the middle of the
program and type LOAD " " followed by
NEWLINEj then increase the volume of

the recorder slowly with the tape running
until the television screen shows four or
five thick black bands. If you then re-
wind the tape, the program should
LOAD normally,

LOADing and SAVEing on the
Spectrum is much easier and faster than
the ZX-81. One difference is that when
SAVEing on the Spectrum the LOAD
lead must be disconnected either at the
recorder or the Spectrum.

Finally, a health warning. Apart from
any practical uses, computing with
your Sinclair machine can be a very
entertaining hobby and is almost
certainly habit-forming. You may easily
find yourself crouched over your
machine, red-eyed, in the early hours of
the morning thinking that in another five
minutes you will solve the problem. Try
to break that habit by getting into the
fresh air and meeting other Sinclair
users.

By obtaining a Sinclair computer you
find that you have joined a not very
exclusive club with many thousands of
members, many of whom would be only
too Happy to advise you if you have
difficulties,

Make sure of your regular copies of
Sinclair User and Sinclair Programs and
you can be guaranteed many happy hours.

112

SINCLAIR USER September 19H3

310 STREATHAM HIGH ROAD, LONDON SW16 6HG

Tel: 01-769 2887

Open Tues -Sat 10.30 am to 5.30 pm (Closed Mondays*

SOFTWARE. FROM ALL THE BEST SUPPUERS-
OVER THE COUNTER -PLUS GROWING RANGE
OF PERIPHERALS, SEE IT N TRY IT BEFORE YOU

BUY IT.

SAE appreciated for catalogue -but please specify
for which computer.

gMJBOM

ZX-81 2Xs PfCfRUM

THE WORLD'S GREATEST RANGE OF

SINCLAIR SOFTWARE

PION EERS IN 1981- WAY AHEAD TQDA Y

RQr a a KEYBOARDS ADn m

BBc -AC0RH cassettes b o O £7m\C10

NEWI-BUFFER CLUB for regular customers.
Speciaf Offers Lee tares — Foreign Trips —
Software Promotions. Ask fordetaifs of member-
ship on your next visit

MEMBER OF THE COMPUTER TftAOE ASSOCIATION -Y0UF FAIN DEAL GUARANTEE

C

VISA ACCESS- AMERICAN EXPRESS- DINERS CLLJ0
ALL CARDS WELCOME

J

SOUND with SINCLAIR

MAKE AMAZING SOUND EFFECTS
WITH YOUR ZX 81
TIMEX Sinclair 1000
or SPECTRUM

THE ZON X
£25.95

no pAipA V AT

' Thr ;ON X SClJNll MNn- romoleHHT wfl cnL-iinnfl dnd no* ,.,U,
Loihuuirr. 11 m»i ffJ (, s n nn dianunriiiMr nr tuirfcnng
No pvww pat*, bnrieiiei isms .,. qHh, e m FJS ■

RftmolVobftiaCtiMraroDMfl* aavic „*,„■.,.„,„. ,,. . . . .,.,

yi*»dardS.ncl,,,r WKIUmeaekerpnTOHwUw , ])NX

Sound Uiiii wthoui atfetafl nwm»l cwnpuiof :*:,-, , .„,

Huhl- r:ingf-H,l rMftAfe luurids fnr Ban*) Muk, HdfccurMfl

Qfgm«. Bells. Torm, Chords, me., nr urfwevHi yn,,

8 M KM. LMM 3 Chinnd sn ur, :

pIKtl. vnhrne of lunraiinri iftse .1 nun - - ■ ■ -_ ■ ■ i . , | , . -

f 'ric,r- a , Cri r ° 81 **?8 4 ;IIT,,,,i '" I ■
-UAJiK.. lines nr mscnirie code

N '. : ;,| f V ■■-!■ Ii .— - sM I O rr.,|.| u .,|

; u - ' :i| '" 1 1 "*<Vta» o' hew !.•.,. . «mtea ..™i rt*

PHSgnawnn aupphsj F.. ■„ ttu^winnd e.n-,.,,, m,,.i..

^^^^r JC ' rVW-P to tnxim.t VA T.

t

"V

nrr

Panmiini may bif n*» by Chnfiun PC' G.«i Nr, :«!■

Utd»r or Credir Card
l-iirjoirurdrn- Bunk Chn, )utf Intro* IHjfaHfenwy OttW
I U ^ fr 01 £ Slutting

\llili/f/#/#///#V

NEW: Speech & Music for ZX81 & Spectrum! *<<
ZXM SOUND BOX ^^^ ZXS SPEECH^?

YNTHESISER<^

£29.95

only
£24.99

3 channel sound chip gives a huge range of possible
sound effects Programmable pitch, level, envelope
and noise source.
For the ZXS1 or Spectrum - no adaptor needed.

Just pjug it in Other peripherals or Ram Pack can be

pl-jgged into the ZXM.

Built in amplifier and loudspeaker.

Audio in- out socket, can be used lo amplify the

Spectrum 'beep\

9-pin I/O socket can be used with cheap Atari/

Com mod ore lype joysticks,

Comprehensive manual includes many example

routines

For the ZXSl or Spectrum - no adaptor needed

• Let your computer talk back!
Allophone' synthesis gives »n unlimited vocabulary

• Active filtering for improved speech quality.

• Other peripherals or RAM Pack can be plugged Into
Ihs ZXS.

• Output to normal audio amplifier or to our ZXM
Sound Box.

• Manual gives full details on how to use the ZXS, with
many examples.

£4.95 The book of answers Explains Spactmm BASIC programming

And Don't Forget Our Books:
EXPLORING SPECTRUM BASIC:

techniques m more depth than was possible in the Sinclair manual, illustrated by ovVrStfiull proqrams ^K mqbs
THE EXPLORERS GUIDE TO THE ZXB1: £4 95 Th e book For the ZX81 enthusiast Games application and
utility programs plus much useful information on machine code and hardware. "Immediate and lasting value"

All prices include U K carriage and VAT where applicable. Overseas customers add £1.50 per item for surface mail
TIMEDATA Ltd, 16 Hemrrtella, Laindon, Basildon, Ease*. SS15 BED Tel: (02S8) 418121

ilililEDAi A E3S^$^

SINCLAIR USiiR September iSSS

113

For use with
ZX-81/ZX-80

IK RAM is
enough to
obtain 8
colours.

Easy to connect
Direct Basic INPUT
TEXT and colours
simultaneously. Plug
directly in your
Sinclair connector.

o«.

Compatible
with all the
memories.

Save £10 on

aDDC

colour interface. A special

offer open

only to readers

of Sinclair User.

Limited
stocks, so
place your
order soon-
Allow 28 days
for delivery.

DON'T MISS

THIS INCREDIBLE
SINCLAIR USEBI
OFFER

Add More Appeal

to your ZX-81

(and ZX-80) thanks to the

DDC Colour Interface*

And at a realistic price of
only £29.95 ( + £2.95 p&p)
usually £39.95

^Compatible with many
Quicksilva and Artie software.

The prices apply to United Kingdom only.
Overseas orders can be accepted but there will he
an extra postal charge, The full pTice can be
obtained on application io ECC Publications at the
address on the coupon.

To: Sinclair User Special Offer,

ECC Publications, "196^200 Balls Pond Road, London, Nl 4AQ

Please Bsend mc DDC Oil. J at the special Sinclair User price of

£29.95 plus £2.95 p&p.

Plunse tick if you require y VAT receipt [

"1 enclose a cheque/postal order payable to ECC/SLf fur £

*l J leasc charge to Access/Barclaycard/TntStcard account no.

"Pleutfe JviUitaJnaiiiplctu a* *p|:£iriih4f:

Signature

Name Mr/MrsfMisa.
Address

Inside...
The NewZX Microdrive!
Latest software...
Latest prices...

TheZX
Microdrive-
and more!

For some time now, the new ZX
Microdrive has been the subject
ot much discussion. Which is
only to be expected, when the
object of everyone's anticipation
is completely new to the world
of computing.

Microdrive provides high-
speed access to truly massive
storage. With just one Microdrive,
you'll have at least 85K bytes of
storage, and the ability to LOAD
and SAVE in mere seconds.
Yet the ZX Microdrive is about
the size of a Spectrum mains
adaptor, and costs less
than £501

First stocks are now in.
Microdrives will be released on
an order of priority basis.
Spectrum owners who pur-
chased by mail order, direct
from us, will be sent full details
including how to order, in a
series of mailings that begins
with the earliest names on
our list.

And if you didn't buy
by mail order?

Don't worry — for a colour
brochure with full information
on Microdrives, including how
to order, just send us your
name and address (use the
coupon at the back of this
issue of Sinclair Special). But
remember, the sooner you
send us your name, the sooner
you'll get on the list.

Of course, there's much
more to Sinclair than Micro-
drives, as you'll see on these
pages. The latest releases of
Spectrum and ZX81 software
have been amongst the most
successful ever. Prices of most
established Sinclair products
are at their lowest ever. To buy
what you want, just use the
Order Form.

Until the next issue of
Sinclair Special, and more
good news ...

Nigel Searie, Managing Director,
Sinclair Research Ltd.

PS: Come and see us - and all
that's new at Sinclair - at the
PCW Show, Barbican Centre,
from Sept 28th to Oct. 2 nd-
We'll be pleased to see you!

ZX Microdrive I

System preview!

ZX MICRODRIVE

At least 85K bytes storage, loads a typical 48K
program in as little as 9 seconds: £49.95.

ZX MICRODRIVE CARTRIDGE

Compact, erasable, revolutionary Complete with
its own storage sleeve. Contains up to 50 files,
with a typical access time of 3.5 seconds: £4.95.

ZX INTERFACE 1

Necessary for sending and receiving data from ZX
Microdrive, Includes RS232 interface, enables
creation of local area network of 2 to 64 Spectrum s.
Attaches to the underside of your Spectrum.
Purchased with ZX Microdrive, just £29.95. As
separate item, £49.95

Six new ways to make more

of your Spectrum

Take a look at these brand-new titles.
Each is an outstanding new program

using the full potential of the Spectrum,
for games with stunningly animated
graphics, for strategies of fiendish
cunning, for masterly applications of
computing capability ...

Cyrus- IS -Chess Based on the Cyrus
Program, which won the 2nd European
Microcomputer Chess Championship

and trounced the previously unbeaten
Cray Blitz machine. With S playing levels,
cursor piece-movement, replay and
take-back' facilities, plus two-player
option, The 48K version has many addi-
tional features including an extensive
li brary of C hess o pe n i n g s. For 1 6K o r
48K RAM Spectrum.

Horace and the Spiders Make your way

with Horace to the House of Spiders,
armed only with a limited supply of anti-
spider-bite serum. In the house, destroy
the webs before the spiders can repair
them. Then destroy the spiders, before
they destroy Horace! Undoubtedly the
creepiest Horace program ever produced!
For 16K or 48K RAM Spectrum.

Computer Scrabble The famous board
game, on-screen -with the whole board
on viewl A huge vocabulary of over
11 ,000 words. Full-size Setter tiles, four
skill levels -the highest of which is
virtually unbeatable. For 1 to 4 players
For48K RAM Spectrum.

(SCRABBLE trademark M*d f:fnpyrighl licensed by
5crii1ib6e SchutrrechlB undHandclsGrnbH -a J.W Spear
and Sons PLC subsidiary.)

Backgammon A fast, exciting program,
with traditional board display, rolling dice
and doubling cube. Four skill levels. For
experts - or beginners. (Rules are

included - it's the quickest way to learn
the ga ma) For 1 6K o r 48K RAM Sper t ru m .

FORTH Learn a new programming
language, as simple as BASIC, but with
the speed of machine code. Complete
with Editor and User manual. For 48K
RAM Spectrum.

Small Business Accounts Speeds and
simplifies accounting work, produces
Balance Sheets, Profit and Loss informa-
tion and VAT returns. Complete with
User manual, For 48K RAM Spectrum,

Overleaf- your Sinclair order form.

I Latest ZX81 software Prices

round-up

ZX Spectrum 48K
now just £129.95.

ZX Spectrum 16K
now just £99.95.

ZX81 now just £39.95.

16K RAM Pack for ZX81
£29.95.

ZX Printer now just £39.95.

1.2A ZX Mains Adaptor
£7.95.

Printer Paper (5 rolls)
£11.95.

These three new cassettes offer two
totally different challenges to you and
your ZX81. The games - like so many
ZX81 games today - really do use the
ZX81's capability. The FORTH program
is a fascinating extension of your own
computer understanding,

Sabotage. Defender or attacker? The
choice is yours in this exciting game.

Be the guard and defend the
ammunition in the compound — or be
the Saboteur and attack it!

Written by Macro nics for a ZX81
with 16K RAM. Cassette price: £4.95.

City Patrol. You are the Commander of a

laser-firing ship. Your task is to intercept
and destroy alien suicide ships
descending on your city

Written by Macron ics for a ZX81
with 16K RAM. Cassette price: £4.95.

FORTH. Discover a new programming
language which combines the simplicity
of BASIC with the speed of machine
code. FORTH's compiled code occupies
less than a quarter of the equivalent
BASIC program and runs ten times as
fast. Free User- Manual and Editor
Manual with each cassette.

Written by Artie for a 2X81 with
16K RAM Cassette price: £14.95,

How to order

Simply fill in the relevant section (s) on
the order-form below Note that there is
no postage or packing payable on
Section B. Please allow 28 days for
delivery. Orders may be sent FREEPOST
(no stamp required). Credit-card holders
may order by phone, calling 01-200 0200 h
24 hours a day. 14-day money-hack
option.

Sinclair Research Ltd.
Stanhope Road, Camberley,
SurreyGU15 3PS.
Telephone: (0276) 685311.

To; SlnclaiT R«*a«* Ltd, FREEPOST, Camberiay, Surrey, GUIS 38R.

Section A: hardware purchase

Oty

Item

Coda

ZXSpectrum-4BK

"ZXSpectrum -16K

3000

Hem Price
£

~129-95

Total

3002

99 95

ZX 81 [including 1.2 A Mains Ad ap tor) 1 003 3895

"TSK HAMpaCkforZXBI

7X Printer

1Q10

1014

29.95

39 95

ORDER FORM

Section B: software purchase

Oty Cassette

Code

Item Price

£

Total
£

FOR SPECTRUM

G 22/5 :Bac kgammon

4021

&es

G 23/S :Cyrusl S^Chess

4023

9 95

G 24r S:Ho race & the Spi dera

4022

595

G.25/S Scrabble

4024

1 5 95

1.2A Mains Adaptor, for use with
ZX81 computer/ZX Printer com-
bination (only required it you have
an aariyZXBI with 0.7A Adaptor)

1002

7.95

LI /SF-ORTH

4400

14 Of:

B6 '/S; Small Bu si ne&S Accounts

4605

"12.95

FORZXA1

iooa

Printer paper (pack of 5 rolls)

Postage and packing: orders under £90 00Z B

orders over £90 0029

11.95

2.95

495

025: Sabotage
G 24: CityPat rol
L1: FORTH

2124

4 95

2123

2400

4.95

14 m

TOTAL £

TOTAL £

'Delele/ complete as applicable.

M encloses cheque/ postal order made payable to Sinclair Research Ltd for £.
Signature

'Please charge to my Access/ Bardaycard/Trusteard account no

J

_I_L

J L

l I I

IMr/MrsrMlSS

1 II

Address [

I

!_1 L_L_l

1 J

I I I

_UUL

_L^_

Mill

sus yns
(Please print }

ZX Microdrive information request

Please send me a colour brochure with full specifications of ZX Microd rive/Interface 1, and add my name
to the Microdrive Mailing List! (tick here) n(Remember to include your name and address on the form above)

Books =

Adults get good guide to
mysteries of the micro

Many parents do not understand children's interest in computers.
John Gilbert reviews a publication aimed at helping them

THE SPECTRUM and ZX-81 un-
til now have been children's play-
Lhings so far as many parents are
concerned. With the availability of a
new book which aims to provide an
introduction to computers for parents,
that situation may change.

The book is Kids and Computers, The
Parents' Microcomputer Handbook, by
F.ugene Galanter. It first takes an adult
through the history of computing to
explain why computers are so important
and what effect they have in our lives.

The opening chapters state that if
children are not computer literate to
some degree they are illiterate as far as
education in Britain is concerned. That
is true to some extent and the author
argues the case strongly in the chapters
which follow.

He stresses the good points of using a
computer. Using a keyboard will pre-
pare a child for typing skills which may
be required in later life. They will learn
that the computer does not tolerate
spelling mistakes in programs, so the
child will have to spell correctly, The
child must also solve problems in small,
logical steps.

The book shows how the parent can
become involved in the learning process
without taking away the feeling of
achievement from the child. There is
even a computer development chart
showing the average ages at which chil-
dren assimilate computer skills. The
learning process can start at about five
years of age when the child becomes
used To the keyboard and is able to
locate characters on it,

II is an excellent introduction for
parents who want to know why their
children spend all Their spare time in
the bedroom in front of a computer
keyboard and screen. It is available from
Kingfisher Books and is an inexpensive
hardback costing £5.95.

Fun Mathematics an your Microcom-
putet continues the educational theme.
It is by Czes Kosmowski and aims to
show thai mathematics can be entertain-
ing.

Some or the explanations are a little
difficult to understand and the general

style of the book would make it of more
interest to college or university students
than to schoolchildren or adults with
only a rudimentary understanding of
mathematics. That is a pity as many of
rhe ideas of the author are of interest to
anyone who owns a computer.

The most interesting chapters cover
games playing and graphics. If you are
interested in gaming strategy or how to
draw three-dimensional shapes, the
book is for you,

Kosniowski shows that almost every
operation performed by a computer is
in some way governed by numbers and
that it is with equations and formulae
that games and graphics are designed.
The book, from Cambridge University
Press, costs £4.95.

The Complete Programmer, by Mike
James, is another book which professes
to show the beginner the difference
between good and bad programming
practice. It is different from most of the
others which seem to be written by
people who know a good deal about
theory but not so much about practice.

James makes no claim about being an
expert in programming techniques, al-
though he obviously iSj and even stress-

es that there is no such thing as good
programming technique, only pre-
ferred.

If a reader can tolerate the dense style
of the author the Text is guaranteed to
increase knowledge of programming
and therefore make programs easier and
more fun To write. On rop of thai yuur
programs will run faster Than they used
to do and The listings will be easier to
understand.

The Complete Programmer is one
book on 'better 1 programming tech-
nique w T hich can be thoroughly rec-
ommended, James' style is slightly
heavy-going and some of his arguments
could be compressed from a page to a
paragraph but the book is worth having
as a reference or learning manual.

It costs £5.95 and can be obtained
from Granada Publishing. It is slightly
expensive but the information it con-
tains is worth the extra money.

Kingfisher Books Ltd, E'lsley Court, 20 22

Great Titchfield Street, London W1P 7AD.

Cambridge University Press. The Edinburgh

Building, Shaftesbury Road, Cambridge CB2

ZRU.

Granada Publishing, PQ Box 9, Frog mora,

St, Albans, Hertfordshire AL2 2NF.

)■

SINCLAIR USER September 1983

119

the keyboard
with a Custom
Keypanel Kit.

Eve ryt h i n^ y < ) u need
(Soothe keyboard with
CUSTOM KEYR\NEUS,

These precis ton die-cut plastic panels fit perfect!)
Over your keyboard and provide an Inst am and
individual reference to all of your software,

Each Kit conies in a clear plastic storage wallet and
contai ns; 10 M at t - black Keypa t re I * pi us sli eets
con tai nirjg me r 140 self ad hew ve O im ma tic 1 1 abel s
preprinted with words, symbols and arrows, plus a
sheet nf blanks for your own designs.

SPECTRUM KEYmNELS are 96 x 224mm and the
labels are printed in Spectrum" brigln red. A Ml ST
for flight-simulation and all multi-key games and
applications.

'I Tie FIRST add-on for your. Spectrum.

ORIC KEYPANELS are 105 x27 5mm and the labels
are *ORIC blue. Master those CTRL and ESC key
combinations.

An INSTANT reference to all ORTCs keyboard
functions.

NOW IN 'SI JEER ML PLASTIC!

I\*st today to Softeach limited, 25 College Road, Reading,

llerkshiri', Rtid 1QE, ^ft4atp«^lB^Rito*ct«Kput*Jn're*um.
Please send me;

Spectrum Keypanel KJisui fc3-9? + 35pp&peadh

(overseas should add 25% I(>r atidili< >nal surface mail)

ORIC Kcypane] KJIsai £4.95 + J5p>&peach

(overseas should add 15% tor additional surface mail )

I tnelosea total rtrminanceoft cbequcs/postal

cinders payah-k- m Sofleach Limit* >d

NAME

ADDKJISS

L— ======= ==============

CRICKET

FOR J

ZX SPECTRUM 48K

By David Owen

Look at these features:

+ EXCITING MATCHES in which your decisions
really count. Make bowling changes and Held paekton-
ings; tell your batsmen to score fa&ter or io be more
defensive,

* INTELLIGENT PROGRAM: The Spectrum
decides your opposition's strategy skilfully and logically,

* DETAILED PL A YER CHARACTERISTICS: Get
to know your team's strengths and weaknesses.

* INFINITE OPPOSITION- Including all the County
sides- Ten difficulty levels.

* BALL BY BALL COMMENTARY — scoreboard,
scorccard and many interesting and helpful features.

* VSMS4SK to tkefitU!

A realistic, addittivt and enjoyable game

£6.95

including post and packing and

nstruction booklet. Export orders add £l-W

full

T. J. OWEN, NORLINGTON, LEWES ROAD,
EAST GRINSTEAD, W. SUSSEX RH19 3TA

Trade enquiries welcome.

HEART RATE MONITOR

FOR ZX 81 and SPECTRUM S

SAFE - RELIABLE - EASY
USE YOUR COMPUTER FOR HEALTH AND FITNESS

CDnvoncrYi :o lw. Conbnijauelv flwrtttilrt y^ur pu J « vnti dtoptai* dipiifii heart rmn-on tho icrnfl*i Plua In
hwrl rune ifHMlHffl iuiLs Speulruun and Zfc-fll [?*ieciB vOuh puis*- from f'lrjer trr thumb plHnjd D^e* Ihr
icnsor unit. The se-noor unit ia linked fry *hn hes*1 r^L* i»i erf away 3 TiuSron of catjl? Include* ■*" SNienoVr
card allDwviu lm of pYaffHf FLAM pauK eirj Tak^e lh>»ci fnxr* the ■""TftirlM - avuidi Ihn uk ai
ttftfre-re-:-

PRACTICE nELAXAIPUH

[j-iiKHiiir'iio en FCdLKring ihc displayed pu«s* rare ., Y'rxir progress can be- recorded Aid d^plH^Air ai J "un*

-n-1 roll' which yau can use a-s a pcrsDia- pcMo-TT arcc record.

MONITOR FITNESS

Cncc+. you* heart rata before anil after a w* e^eH^ipa Moniuir how qi*nr«.ly "1 -etaf m to no^ma*. Va^jf
fitness- level can be assew^tf by th** mrunod ami ustfd as a yardstick 'o* luture compar-ion*. Whalavar
fc*m of exercise you in*, a its afFaul o-i tit? ptAw r 0l« uvi Lw a vvni'iuvii ndiLi-lor u* FHtic^t.

Sinpto l>AAir: |*i r^ mm a fjtn he Ltnnd za pncirj^icc c^ifihs aF hirjrr rain uft'Siis t-.t* I inkAd iu y-fHji 7K fll i>r

5|,iyi. inn. c^mpiii* 1 chs tngnal can bm usarl in yrur own diimpla brnic pio^iArrifl ro yiv+i i.i>iIih.hii.? hMTI

■ h3h ilrft|»iflryA. ti^t crurtb, grapbs *tc Campaliblc with si' u^clsi of protjiarri ham un>pk bailc rijuinmu

tnffwnlri ripnr.TTum iisc^s ran incnfprwatc b«p commanda i:a n/vn- EiJG rypa arxinrtL

IJi-frx narl inr^rtarc with the usa at * printer so you can down load vOlh parfarmirici- ci#mi Pw

(.'CimruriA^n.

SUPPLIED HEACY BUILT - jnelutat plug, bl H**n R«l« MlMtil&r irkltaH*c» inlh ■[■■rnU* t-rrl.

nmurudl *nd iBihinQj C^y*. MhVtArt AFMl ■UiruCdkMll r HEADY TO USE E29.BB. OHDEH AS
HFAHT HATE MONITOR |HHM SLI I. STATE ZJC-B1 Or SPECTHUH. Eia.aR.

i I

ZX SPECTRUM
AMPLIFIER

£B0rnW iKj(pu1 VoiUrM fl O W iri Imem^
speakci. Vary liniplv COfvie^Wd triinit load 1 '
savH l&ad. Puts real ?rowar (jv«n inby i'n* huh
p^tist. "'Beep" CTynipi?Kids A^Jds y r^l "*lrwT'
ti^ muaical prDejrarrB and games. FlbCfjires PP3
barifirv not supp*ed. Very kwr current rlrain
*kjp*ilhrd ready buirt cDcnfjIele wnh de*no soft
von tfHl iniirjdions-.

OflDER AS: ZX SPtCTHUM
AMHJFIER ISA SU|

ZX SPECTRUM
SUPER AMPLIFIER

2;5QnyV i"ii"lput Nrjiiw ndd Evihesij-nr ouaiity to
tlxiae ''BaeiJ' 1 comrnanr*! Super circLiit *r*tfi
adjustable ATTACK BLBTAM and Of CaV «r>
^rktpc contr-^D- f*li/* variable CCHO. Ci w i ntii
a wkJb ranuie of apecial eftacla Fiuv Qtwkjuad
contnala. Intern-al -Fpe-afcers-. Very iTian cams.
Requires bai^e^ies rwl suppiie-d Vary fciw
current drain.

R^adv bull. compLrta with da*rw sa-'Hivve irri
instrart-Dns

ORDER AS: ZX SPECTRUM
SUPER AMPLIFIER ISA A SU]
E17.9B

MJIGINIA ILLCj I HONIUi LIU U»p( till. 131 HuntH jtT»t Byrtma) T m\t. Bliffi DEH
ttT. 102631 HUI. Pf)«i 4pk4ih1« VAT, uk) 50v P*p. Mi wWi into. JLgmuAnm Hy phor*. or
po»t.

120

SINCLAIR USER September 1983

APOCALYPSE

A rcw lju tS(* •- r^K-riputier gpmx-cj.
A i"i>_*LJ-pHy=r ge*T~c nf =trnt*^iy «nrl diF*^T""£K:y.

n4e™s ruu inKlwFR eatf-ieof™ COntHmn JuUT
mepa, TT-™ BBC vsrnm \B uuHr"- 6SK erf program «)
dawi !*n clr" EpHCTMjm W3*al« nun' SfJXi .

PLAY IT DEFOTIE: YOU'RE IN ITI

£9,35

■mc. VAT

Apocalypse

As/ft* jf-^ii-^ *//.: . ^ ' /.r .T<J

V

SPECTRUM 4Bk^

► V

Y^- ■*-*•->*

?£#$*# }£****-

#

BBC Model B ,. a -

TO HE F*LE,&SED EARlV AUGUST

Corning soon - voujme 1 - © new m nu n

rules exj^bff 1 thtf onllsptjf* o^ th*5 Oc/r'ao fcrr0pe,
SAAArf h. 13W*J h-cJ el'e Napoleonic- Wh,-?;

RED SHIFT Ltid

13C NlE*ro~ nd..5l/Jr.e Nn^J-Qca".- LizniJTi M1B. Tel 300-1333

jjgrt *=3 jper icc-ce trcri Earne r \PJ!y- k^f-typ\-i^ i Lcnrl^Ti

BUSINESS USERS

SPECTHUM 48K
ACCOUNTS PREPARATION

Produces Prime Entry Listings, Nominal Ledger, Trial Balance,
Profit and Loss Account and Balance Sheet with supporting
schedules- 73 nominal ledger accounts and automatic VAT
calculations.

Sol e Trade r/ Partne rs hip ( Up to 4 ) £ 2 5 - 00

Limited Company £26.00

(Combined Price £35.001

SALES AND PURCHASE LEDGERS

Produces day book, sates/ purchases and VAT analyses,
debtors/creditors listings and statements. 250 accounts and
1000 monthly transactions. Automatically calculates
VAT. £25.00

ZX-81 IfiK

ACCOUNTS PREPARATION

31 normnal ledger accounts
Sole Trader
Limited Company

(Combined Price £25.001

£17.50
£17.50

SALES AND PURCHASE LEDGERS

Produces day book, sales 'purchase and VAT analyses,
debtors/creditors listings, statements.
50 accounts and 200 monthly transactions.
Sales £20.00

Purchases £2000

(Combined Price £25.00)

AH programs nave been professionally developed and are
being used by practising accountants and smail businesses.
Supplied on cassette with operating instructions.

Put! details;
HESTACREST LIMITED

P.O. Box 19, Leighton Buzzard, Beds. LU7 0DG
Tel, 052-523 785.

JL -f. JL

•rM-OrtCOUEDE

71 ROSEBERY KOAD ■ LOHDOM titO 21 A
TELEPHONE 01-883 Wl I

(DMNICALC (48K Spectrum)
The best Spectrum spreadsheet

you can buy. Written in machine
code to be faster, to give you
more space for data, and to
allow more features to be
included, it is guaranteed
uncrashable.

* 99 columns or 250 rows.
*# Fully prompted input.

* Extensive repeat facilities.

* Supports ALL Spectrum
functions.

* Unique iterative facility.

* Totals/Sub-totals.
+ many more,

"ff more programs sflared the

quality ot OMNtCALC fften we

might see more Speclrums in

offices'*

Home Computing Weekly

3/6/83

"ft is idss! fur someone who

has just found the spreadsheet

concept, but st is also a very

powerful tool for anyone who

has used or?e previously"

Sinclair User June 1933

Complete with comprehensive
manual- £9.95-

T#j

'^^-Z

L4lf'|

-*.t.:\'(-i."

^£££11*:

IB

cz

r*-

,jrj&&

&

#

'a

i

rS**^

'.'.i*

,.^-'

f'^ J**'' EVOLUTION (46 K Spectrum) Smilodon,
.fijr^/' : Tyrannosaurus Rex, Diatryma Slegosaurus,

4^/- Podopteryx, Brontosaurus are just some of the

'■■'*J' , creatures you n M meet on the fascinating journey

'from the start of life on this planet toman. Educational

** and fun, this adventure took 35-00 million years the first

1 time it was played . . . Can you do it quicker^ ... - just £6.95

CREVASSE /HOTFOOT (Any Spectrum) Can you make it

: '.*:«, across the ice-cap whilst chasms open and close all around you . . ,

.'v:'A'"' A o r help a hungry rabbit in a hostile world - , - "Simply Wonderful"

V Sinclair User June 1 993 ... 2 original games on one cassette- oniy £4.95

THE TRAIN GAME {Any Spectrum) The game that starts where model

■ railways left off. Full graphics featuring passenger, goods S express trams;

' tunnels; stations; turntable bonus games; irate passengers; collisions; derailments;

and everything else you expect from a major railway! - Superb value£5,95

. ^ r ? '' ■". '•*-;'

;■'#.■

SfNCLAIR USER Scptembf.T 1983

121

BARGAIN-HUNTERS
READ THIS!

Whatever your model of Sinclair computer— you can get
HOURS of fun. intellectual satisfaction and education for just
95p per month!

A bargain?

That's Sinclair Programs magazine— the fat, glossy
magazine that's PACKED with original, tested programs for
you to load and run.

With Sinclair Programs every month you can build the
library of programs that suits your mood: in recent issues
we have challenged our readers with programs to test their
skill at Sharpshooter or Laser Cannon , . . jolt their brain
cells with Quadratic Equation or Monster Maths ... or take
a practical turn with their own word processor program or
graphic generator.

That is just a fraction of what you get from Sinclair
Programs. Each month we have 40 programs for owners of
ZXSOs, ZX81s and Spectrums. But make sure you don't
have to hunt TOO far for your bargains— Sinclair
Programs always sells out quickly, so order

rc.s^'Uv

yours TODAY from your newsagent, or fill ^ oTftT^^cVSA^ 1 ^

in flio frvrm h*ilnur And We Will Send ^ -T iQfi-sW^ _^li-ft * l

in the form below and we will send

it direct to you,
every month

5 d,

\96

^ -$aa

^rr^ c

VD

\&

c* e

a*

;!**

Cai

^rJSi^S^'* 1

^iat^ e

/AW<

SPECTRUM 16K/

i ' '■- K -ARD (3T< fqUfls 1 ILK OKHiW

GUN LAW

You're .i bounty huntet entering ,i
deceptively sleeky town For behind these

windows and saloon doors there lurks the
meanest bunch of trigger happy outlaws.

Bui be careful as you try tooi irgun them
there are innocent townsfolk around.

Only your wits and gits will save you.

FuD colour graphics and sound effects
give realism dul'll have you trembling in
vow boots.

ANDROID ONE

THE REACTOR RUN

Destroy the reactor before the reactor
destroys the woe id Biasl through brick walls.
mates and strong rooms, dodge moving
obstacles and overcome hordes of fiendish
mutants. To carry out this "mission impossible'
you have just one weapon. Android One And
vou'll be amazed at his agility

Sophisticated animation, fult sound
effects and hi res colour graphics in a game
that's setting explosive new standards.

Thefurst in a series of real-time Android
adventures.

VORTEX.

M1NDBLOWING

SPECTRUM/ZX81
SOFTWARE.

ASTRAL CON\KX

Journey through hyperspice to defend

convoys against alien attack ships.

Avoid the deadly warp mines to survive
Machine coded for fast action and

dramatic effects.

SERPENTS TOMB

Seek the crypt of Xetrov and defy the
great serpent to remove the treasure.

Ancient powers dog your footsteps as
you journey into the nether lands

DEALER ENQUIRIES WELCOME

Contact us aL 280 brookbnds Road-
Manchester M23 9HD. or Phone 061-973 95SO.

PtJKASF. RUSH ME

] .wnRom oneip

] GUN LAWi.M

1 ASTRAL CONVOY^

L

serpents roMJ^si

£5.95 EACH
£5.95 EACH
£3.95 EACH

£3.95^

SPECIAL OFFER -

£1 OFF ANY TWO G AMES

€

TOTAL VALUE-

I

Enclose FO/diet|ue- jHyjble 'r> VOKTEX SOFTWARE

NAME

ADDRESS

Rend ia Mail OcdeT Adidn?S4
VORTEX SOFTWARE.
26 CRAWFORD ROAD. HAIi'lfcLD.
HERTS. A[ JO GPG.

122

SINCLAIR USER September im

Helpline

Can you prevent the

program

Andrew Hewson considers security and zero line numbers

EACH MONTH I re-read the lat-
est batch of letters and note the
contents. Then I decide which
to answer in the magazine,, trying to mm
easy topics for beginners with some-
thing more substantial for the more
advanced.

Despite summer weather there have
been sufficient dedicated Sinclair users,
red-eyed and finger-sore 5 scribbling fe-
verish note& ahout desperately import-
ant problems to provide rhe usual
mixture of easy, mterestmg> exacting,
impossible and incomprehensible let-
ters.

The first is from Chris Porton of
Pinner, Middlesex. He writes: Some
games listings contain an O REM
statement when fisted. How do you
obtain such a line number and can
you prevent the rest of the program
being listed, too?

To answer the question I must first
explain a little about how a program is
held in the ZX-SI or Spectrum. To
avoid confusion I shall explain the situ-
ation for the ZX-81 in detail and then
outline the differences for the Spec-
trum.

The first diagram on page 171 of ZX-
81 Basic Programming shows that the
Bask program area h tarts at address
number 16509, The following simple
ZX-81 program PRINTs the contents
of the first 20 locations in the Basic
program area on the screen, i.e., it looks
at the 20 locations starting at 16509:

10 FOR 1 = 16509 TO 16528
20 PRINT I-TAB 8; Pn'EK I;TAB
16;CHR$ PEEK I

30 NEXT I

If the computer memory is cleared
before the program is entered, either by
disconnecting the power supply tempo-
rarily or by entering NEW, the program
area will contain the three program
lines only. Thus when the program is
RUN it will be looking at itself. The
screen display will show, for example,
that locations 16513 to 16520 contain
the code for the command 'FOR* (235)
followed by the codes for each of the
seven characters I, -, I, 6, 5, and 9,

The first two bytes, 16509 and

• Pfazxf address problem* ami queries to Andrew
Htmm, Helpline, Graham Close, Btewbury,
Oxfordshire.

16510, contain and 10 respectively
because those two bytes are used to
specify the line number of the First line,
the calculation being:

256 * first byte + second byte = line
number.

Experiment by POKEing new num-
bers into those two locations and then
LISTing the program to see the effect.
Try, for example:

POKE 16509,10
POKE 16510>27
LIST

It will be seen that the line number of

the first line is then 2587 because

256 * 10+27 = 2587.

Notice that the order of the lines has
not heen changed and therefore it can
be concluded that rhe ZX-81 has taken
no action as a result of the interference
with the contents or the program area.
The program no longer works because
the NEXT command in line 30 directs
the ZX-81 to continue execution from
the line following line 10. As line 10 no
longer exists the program fails. Hence
unless care is taken ro avoid the use of
EOR-NEXT loops and GOTO and
GOSUB commands it is not possible to
run a program with line numbers cor-
rupted in that way. 'lliere are two tricks
worth mentioning. Try entering:

POKE 16509,39
POKE 16510,10
LIST

The first line number will then be 9994
because 39 * 256 4- 10 = 9994.

cunt mued tin ftage 124

Hex code

01 oAon

Zh 53 sc

70

23

71

23

5E

23

%

23

19

E5

ED ^K 4B 5C

A7

ED 52

30 W

09

44

41)

El

1SE4

El

C9

Tabic I- A program to

and GOSUBs.

Assembler code

Comment

LJDBCIU

New first line number

LD HI.., fPROG)

Begriming of program area

LD (HL),B

Insert new lint

INC ITT.

number

LD (HL)C

INC HL

LD &{H I .)

Load line length

INC HL

into DE

LDD,(HT.)

INC HL

ADD HL S DE

Address of next line

PUSH HL

Save address

LD DEBARS)
AND A
SBC lfL,D£
JR Ne,9
ID HI,, 10
ADD HL>BC
LD 8,H
LD C,L
POP HL
JR -28
POP HL
RET
re-number Basic programs on

Address of end of program

Clear carry flag

End>

Jump if yes

No, sitj) size is 10

Increment Tine number

and si ore in ESC

Retrieve address
Jump to continue
End

the Spectrum, excluding GOTOs

L

SINCLAIR USER September 1983

[23

= Helpline

cvfuinued from page 123

The largest line number allowed on
Sinclair machines is 9999 so, it may be
asked, what happens when an attempt is
made to insert a bigger line number? To
determine enter:

POKE 16509,40
LIST

The first line number is then shown as
A 2 50 whereas wt would have expected

it to be

40 * 256+10 = 10250.

Reference to the table of codes of the
character set in appendix A of ZX-81
Basic Programming gives a clue to the
situation. The table shows that the
codes for the digits to 9 are 28 to 37
respectively and they are followed by
the codes for the letters of the alphabet.
The ZX-81 is programmed to expect
line numbers to contain at most Tour
digits. When it finds a line number
which should have five digits it uses a
single letter from the beginning of the
alphabet to represent the first two— A to
represent 10 r B to represent ll s C to
represent 12.

Provided the line numbers are kept in
order, programs can be written to use
line numbers up to 16333— which ap-
pears as G3S3- Fortunately the machine
will accept incorrect instructions like

GOTO 12530

which makes writing such programs

easier than it would otherwise be.

Attempting to POKK in line num-
bers greater than 16383 causes the pro-
gram display to disappear and so this is
the answer to Porton's second question.
To see this effect enter

POKE 16509,99

The program no longer function*
although it is still present tn memory as
can be seen by entering

POKE 16509,0

The Spectrum is very similar to the
ZX-81 in those features. The principal
difference is that the program area does
not start at a fixed location. The address
is held tn the PROG system variahle
which can be read by entering

PRINT PEEK 23635+256 * PEEK
23636
The result is normally 23655,

The Spectrum character codes are
also different from those of the ZX-81,
as can be seen by studying appendix A
of ZX Spectrum Basic Programming.

Phil Jones of Carshalton writes: Is
there a simple machine code line
re- number program which also re-
numbers GOTOs for the Spec-
trum? 1 have seen two in magazines
but they are too complicated Tor me
to understand.

The short answer is no, but I can
help by explaining the various tasks
which must be executed by the routine.
Enter and RUN the following program
which looks at the Spectrum program
area:

10 FOR 1 = 23755 TO 23800
15 PRINT I;TAB 8;PEEK I;

16;CHR$ PEEK!
20 NEXT I

TAB

Locations 2375^ and 23756 contain
and 10, thus specifying the line number
of the first line. Locations 23759 to

23766 inclusive contain the codes
FOR,I, = ,2,3,7,5 and 5 but in between
(here are locations 23757 and 23758-
They contain 27 and and iu doing so
they specify the length of the remainder
of the line. The calculation is

first byte + 256
length

i.e., 27 + 256 * =

second byte = line

27,

The re-n umber program can be
executed by entering

RAND USR 23296

If the program has been loaded cor-
rectly the Basic program will he re-
numbered using a stepsize of 10, not
five as shown in the original listing.

A program to re-number GOTO and
GOSUB commands as well as program
lines would need to execute the follow-
ing steps:

Reserve some space in memory as a
working area.

Identify each GOTO and GOSUB in
the program and store its address and
destination label in the working area.

Re-number each line in turn, check-
ing the old line number against the
destination labels in the working area.

Whenever a match is found, convert
the new number to character form and
over- write the character form of the
destination label.

If the new and old labels differ in
character length, extend or contract the
entire program area to accommodate the
difference. For example, if the old label
were 95 and the new one 140 the
program area would have to be made
one byte longer. Update the addresses
held in the working area appropriately.

Convert the new line number to float-
ing point form and over-write the nu-
merical form of the destination label
held in the program area.

Delete the entry in the working space
so that labels are not re-numbered erro-
neously more than once.

Clearly the code to undertake those
tasks must be sophisticated. Some
ROM routines can be used— to convert
numbers from character to numeric
form, for example — but a suitable rou-
tine is nonetheless likely to be 400 to
500 bytes long.

Hence the line ends at location
23758 + 27=23785 as can be seen by
allowing the Spectrum display to scroll
on and noting that location 23785 con-
tains the liNTER character code (13)
and is followed by two hytes containing
and 1 5 forming the line number of the
second line.

Armed with that information it is
reasonably easy to write a program to
re-number only the line numbers of a
Bask program. An example is shown in
table one. To load the program enter
and RUN the Basic hex loader listed in
table two and then enter each pair of
hex codes given in table one in turn. On
completion, enter S to stop the Basic
program.

5

FOR [-23296 TO 23551

10

INPUT ZS

IS

II-Z1-"S" THEN STOP

20

PRINT Uf "i

2^

LET aSKl)«CHR* (CDC*
Z$<1 ) - 7*(CODK ZS< ■ I ) > 5 7})

30

LETZ?(2)=t:HRS(C:01>h

Z%(2) -7*('CODE Zi{2)>57))

35

POKE I,l6*CODE Zt(l) + CODF
Z${2)-8J6

40

NEXT 1

Tab]* 2.. Spectrum program m load
pairs of hexadecimal codes into ihc

prinlrr buffer.

124

SINCLAIR USSR September 1983

NOW. A ZX81
PUSH-BUTTON

KEYBOARD

FOR UNDER £10

I Wake sure the r^ndi tr^hnard i:; ■>;■>
and check tM all »* Wys lunctian.

2 The Bnttdnstf i Meld n plane
hy self adhc^iv'.' :••

}. 3 j ill you ilo if. remove Lin;
pi elective tacking

.- A i.l piece if centrally un ¥-;:■! ii i"f-H\

At last there's a really cheap but efficient way of
ironing out theZXSl's only real bug: its keyboard The
Filesixty Buttonset offers:

■ A full-travel calculator-type moving keyboard for only
£9.95. ■ I nstal led in seconds. The peel-off adhesive backing
means you just register into position and press. ■ No messy
labels, dismantling or soldering. ■ 3 groups of colour keys
to pick out shift, numerals and newlinaa Precision moulded
in ABS to match your ZX81, witti contrasting legends for
maximum legibility

Filesixty Ltd, 2b Chippenham Mews, London W9 2AN, England.
Tel: 01-239 3059. Telex: 268 048 EXTLDN G 4087.

Orders to Filesixty Ltd., FREEPOST, London W9 2BR

Cheques/PO made payable to Filesixty Ltd.

Please send me

(including Wand P&P),

Total £
Name

|qty) Button se1& .at 19.95 each

K CAPITALS

Ac dress

SlJiO

FILESIXTY

SINCLAIR USEE September !983

129

Play in the big league
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Every month, we'll be adding to our catalogue to bring you the
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With our special new deal — you just CANT GO WRONG.

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not entirely «*»2*Lr» t0 us within 7

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The Software Workshop, Yew Tree, Selborne,
Hants GU34 3JP

126

SINCLAIR USSR September 1 m

* /?

m*

%j

.*r

&&

#S

'^

n**

•^

I

sr

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Here's a whole NEW selection of

the latest games, the best- value software

for your ZX-81 or Spectrum.

ZXS1 Software

1-01 Stock Market

Buy and sei I yui ir way to milions '

1GKPAM £3.95

1-0? Football League

First division fun for the soccer

enthusiast . 1 B K R AM £3.95

1 03 Test Match

M«u:h yuur wits alongside the

<*41flrVil.yr-H 1 8K RAM £3.95

1-12 Avenger

Avatd missiles and bombs tu betxmnj the

nJer 1RKRAM £4.95

1-13 Protector

Defend your awn ship from oncoming

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unit trusts, Clares aod lean st.ncks.

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1-32 Camp U Tax

Accurate personal income tax calculator

for 82/83 tax year Full documentation

iniJi.jrjHil 16K RAM £9-95

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2 13 Sentinel

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To: The Software Workshop, Yew Tree, Se I borne, Hants GU34 3 JP

I wish to order the following programs. I understand that:

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* J can return products within seven days if not entirely satisfied and
receive a replacement.

Ref No

Qty

Title

Price

Postage, pi
first casset

cassette. IS

joking a
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ton-UK

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SINCLAIR USER Sepiembet 1 983

127

.

THE MAPLIN TALK-BACK
for ZX81 and VIC20

Now your computer can talk

*Allophone (extended phoneme) system gives
unlimited vocabulary.

* Cnn b« used with unexpanded VIC20 orZXSl
— does not require large areas of memory.

* In VIC 2D version, speech output is di rect to
TV speaker with no additional amplification
needed

* Allows speech to be easily included in
programs.

Complete kits, Order As.
LKOOA (V IC20 Talk-Back), Price £24.95 .
LK01B(ZX&1 Talk-Back}. Price £19.95.
Full construction details in Maplin Projects
Book 6. Price 70p. Order As XA06G.

SOUNDS GENERATOR
FOR ZX81

3 -Programmable tone generators with

programmable attenuators turns your ZX31

into a mini-synthesiser.

Noise generator with 3 pirch levels enables the

creation of most s pec ral effect sounds.

Single address access v>a BASIC with PEEK

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port socket or motherboard.

Complete kit Order As L.W96E Price £10 95.

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ZX81 INPUT/OUTPUT PORT

Two Bi-directional ports for a total of 1 6 input or

1& output fines.

includes one buffered output which can

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On board address selection allows for

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Complete kit. Order As LW7GH. Price £9.25.

Full construction details in Ma pi in Projects

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MODEM

A CCITT standard modem that connects

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frequencies at 300 baud. May be used to talk to

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mapuri

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ELECTRONICS for ZX81

Full size, full travel keyboard that's simple to

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Order As LW72P.
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ZX61 sound on your TV set.

Video reversing switch for normal or inverse

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PCB Order As GBQ8J, Price £2 32.

Edge Connectors {4 needed) Order As RK35Q.

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Track pins (1 pack needed}. Order As FLB2D.

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INTERFACES for MODEM

Interlaces for most popular home computers
which do not have RS232 ports will be available
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All prices include VAT A carriage. Please add a 50p handling charge (0 orders under ££ Igtal value.

128

.SINCLAIR USSR September 1983

Mind Games

Quentin Heath goes in search of the evil and
mysterious Black Crystal and into the Halls of
Things to find magical milk

Graphic action takes
adventures into new
areas of interest

THE CONCEPT of an animared
adventure is reasonably new.
Such a package is distinct from
an adventure like The Hobbit or Planer
of Death, because all the action takes
place in graphics form. There is litile or
no text with this type of adventure.

There are only two graphics adven-
tures which stand out in the market at
the moment. The first to be produced
was Black Crystal from Camel! Soft-
ware, The company produced a version
of the game for both the ZX-81 and
Spectrum.

The adventure is loaded in several
sections because of its memory require-
ments. Each section puts the user into a
different scenario. For instance, the first
part displays an overhead view of a
fantasy land in which the game is taking
place. In that land you have to find the
rings which, when brought together,
will destroy the evil black crystal.

To find all the rings the player must
go through forests and castles to reach
the tower room where the black crystal
has its domain.

When I first started to play the game
the rings seemed lo be scattered ran-
domly around the map. Soon I found
that several of the rings could be detect-
ed in the forest area of the map every
time I went back to the program.

When I had found all the rings on
map one 1 entered the castle in the
middle of the map. There are several
levels to the castle and on the lowest 1
found an invisibility charm which
helped me to evade the ghouls which
plagued me continually.

Another difficulty which you may
find on level two of the castle is the mist
which can damage your health serious-
ly. The best way to disperse it is by
using your power drain.

When moving round the castle it is
best to keep your finger on the 'swerve 1
key. Thai will use some of your energy
but you will avoid some of the nastier
aspects of the monsters when they strike

at you. To get to each map of the game
you have lo know the code numbers
which have been given to you from the
previous map, I have several of them
but if any readers have discovered the
last two I would be interested to hear.
Black Crystal is a liasic program and
as a result ihe game movement routines
are slow. The second graphics adven-
ture to reach the market is Halls of the
Things and, despite its awful title, it is
very fast to play,

It is written in machine code and is
the first graphics adventure for which I
would recommend a joystick. The ac-
tion centres on a maze of seven levels.
Each level can be reached by moving up
a staircase on the right of the maze.

As with Black Crystal, the object of
your quest is to find the rings of power
but to do that you must kill as many of
Lhe things as you can. To do so you
have a bow and arrow, lightning bolts
which may rebound on you, and magi-
cal firebolts. The monsters are also
equipped with those weapons and if you
are hit by one of them your strength is
sapped.

To regain your magical strength you
must drink as much as you can of the
milk which is lying around the maze.
That part of the game is not stressed in
the documentation with the package* as
the authors believe that players should
find their own ways to survive.

One of the most important tips which
I picked up during play was that you
should have your finger on The fireball
key when you enter a section of the
maze from the srairway. When you get
into the maze you will not be able to see
all the monsters which are approaching
you. A fireball will be produced if the
monster is in your vicinity, so when you
see that flame flare you should beware
of the Things.

The fireball is the easiest weapon to
use, so at some point in the game you
will be tempted to use it all the time.
Unfortunately that weapon is also the

3 Dl

xo

lo

r- P

Br -

A

m

WW

■-;

E

L In

ifll

5

most costly in terms of magical
strength. If you have time you should
try to use your bow and arrow.

The bow is the most difficult of the
weapons to use as the Things will often
surprise you and launch a quick attack
even before you have your bow
stringed. To lire an arrow you must
indicate in which direction you want it
to fly and then press the arrow release
key. Several shafts can be fired at one
time if the need arises.

The mazes which are created in Halls
of the Things are set randomly but the
game is easier to play in some parts of
the maze than in others. The upper
levels are the easiest to play in because
there are fewer narrow corridors and
more open spaces in which to see mon-
sters coming. The expert, however, will
find many things to tax the brain in the
lower pan of the maze,

HINTS AND TIPS

Halls of the Things

When entering JMU will be amazed,

Just fire a quick bias! io *tan a blaze;

With lower levels you have more chance,

Ahtve those monsters will tad you a daru:e;

All that glitters in run gold,

The watt 1 * one. place to metamorphose.

■Hack Crystal

Castk stairs.,

In wall-like srwes;

Where weapons arc concerned,

True means lo an end are always appropriate.

• lj you have any vkmt on mind games
or if you have hints and tips on adven-
ture, computer -moderated games or chess,
please write to me:

Quentin Heath, Mind Games, cfa Sinclair Uter,
ECC Publication*, 196*200 Balls Pond Road,
London Ni 4AQ.

SINCl AIR USER September f 983

[?.<*

TELESOUND 84

(Patent Pending!

<w

SPECTRUM BEEP BOOSTER
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TELESOUND 84 fits inside the IX Spectrum

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eliminating soldering. Dealer enquiries

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WIN THE POOLS??

SPECTADRAW 2

THE NEW POOLS PREDICTION

PROGRAM FOR THE 48K ZX

SPECTRUM

Spedadraw 2 examines Ihe recent form ol teams playing in each
weeK's English and Scottish Football League matches and (hen
refers lc a large Database to sec what has happened in the
when teams with similar lornn met. By combining lbs lessons leaf ni
irom (he past with the I earns current league position, it can then
identify the matches which are lively to yield draws and output
suitable prodigious. The program will also predict Ihe mulches
which are least likely lo result n draws so that suitable fixed odds
predictions can be made tin home and away results

The program is supplied complete with a database tape containing

dais on over 7500 matches, together with a comprehensive
instruction manual Fhe database tape contains all results up to the
date of disnatch.

Program, database and instruction manual
only £12.95 inclusive.

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1 Cowleaze, Chinnor
Oxford 0X9 4TD

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Trip best 1 fjk Spectrum Cbei-s pmgraii. 13
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1M© 43k version's drsl throe levels AnatyW
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Improve ypur andyf mlh Spectrum Br dgc
lutof Uses rht? Ami biddnly system including
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o* mn tadditg and play, following thtr card
oiay 15 yn Kaplans! iun ol those aspwvis
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play T'usT t>e n^i^r; in c* der lo progress bv1 3
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Artvani-ed f40 hands.} Eft.Sfi

COLOSSAL CAVES

lAdverTurt 1 by AfierBOlt)

Enler the Colosas! Cage discover Ihn
treasure err try Ihe ivnard. On youMravais
yQU rtill nun:? dr^Lgcnit, Kiiakeu. hulli and
Other Ge<ii?Qnn nf |i-.n underworld. Be
warned: 1his dcjMqntMrt- ->'in he: addictive.
Includes; a. save lamiity 5c mat Ihe
adVjenlure can be continued inom the nemt

r4tju:hHr! wtittn »;3ved.
4BK Spectrum Cli.95

^

*S "" 8 t/,.

^**ta

^^-WflfQ^ ^ SNAIL LOGO

r*

I*

Speech from the Spectrum
48k

SOFTfllK I 'Mulliwards" 70 pine WOrdK

£5.95

SOFTA.CK II ■5uHC*gam«a' BO plus wordrft

£S.*S

BEEPER AMPLIFIER

PIuuji tliracLv to (be Spectrum^ CAP, 01 MIC
^nckKt. Batterv powered ^ncJ ivpplitdl
C6 9B

(ir SAVE £1 when ordered wUh a-ny progr^in
t^eBse add 35ij?im pflp

.",■' ,iduai^c*[i irnpfenienta'i^ri tu fh« Logo lurtlo
IVFW graDtilcs Uses Hie Qr^yi?i.1l slyl« l,ngn
ins|r(jC""-Ons lii L jri'r^>l lh« niuv^nnsntd oH a
Qiao^iPal Sriail around Ire 5croen i^BJead Dt a
onech&hicai :..i'l> n>/..iies the tahevvniQ
'iMli-rn:*- m Full qnerating 5y6l«m anj Cdlluf •
Cumprvhcfrsnre u-ser Quide rill ^d^iniii-
progrirns fj Muli level H erarchjL Procedunjj
■> PPDceAAnfda * in Paramcitfr* t Recursive

PrOCedu'u^ # Nc^LihlH^ ri^pfr;i| ioo-^E 4
V&TlsWea 4 Colour anrj w«ali touflcing co-ihuls
• 25 kiimj^aa? inslnjctmna. c*w SO warning
nnc: vrror messag^i * Cdrnniandi lo control
the Optional JEAKCR turtle
4fl It Spectrum CO 05

/.I AKIH TUHTL1: y»>1h f-eil and :jti:,liuL:ric:n

sensors. Can ue uwd with our giwcKum Snetl

Lofjo. ftit SAKEH CWi tM imd wild Doth th«

bpecl'urn invd ZXfil or gthor micros with

K...it;it»in rvi'K

ZE.AKER in Kil Form • C52

2g AKER Fleadv A^^cmblBd - t^a.so

2KJ31 Interlace .. , C1J

Z3 'u- P£P and 1 h"i. VAT

UK Pncss inOu-de post & pathi'ig DespatCb mil Kin 4fl hours of receipt Oi urdor. S«nd SAE roi cotnlogur? Also available Irom WH Snum • Compute* branches

s^T™fSs^™^^^ CP SOFTWARE. Dept. SU7, 17 Orchard Lane. Prestwood, Bucks. HP16 ONN

TOP RATES PAID FOR HIGH QUALITY PROGRAM S -
SEND YOUR MATERIAL FOR EVALUATION AND PROMPT REPLY

130

SINCLAIR USER Stpjembtr tW3

Zooming into touchdown at Wt15miths t John Menzies and other good newsagents now

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Bursting with great new comic strips , . . exciting stories . . . astounding facts . . .

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Its the only comic for the age of the computer- ^_

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AVAILABLE NOW

and every fortnight . . . order your copy TODAY

THE TOMB OF

DRACULA!

D HORROR

\

ADVENTURE GAME!

For the 16K ZX81 or with colour and sound for the 48K
SPECTRUM, a superb 3D qraphics adventure game! Enter
Dracula'b tomb at 30 minutes to sunset . - - wander through the
tomb's pre-mapped 300 vaults in search of the fabled Vampire's
Treasure . . . pick up valuable silver stakes and use them to defend
yourself against the lurking horrors . . . ghouls, zombies, pits of
primaeval slime . , . S«a them all on the computer's plan of the tomb .
. . when it will let you! Take a chance on a Mystery Vault . , . if you
dareJ And all the time the minutes are Ticking by to sunset . . , when
Dracula rises from his coffin and comes after you! Each qI the
infinite levels oF the tomb has its own 300 vaults , . - go as deep as
you like, the Prince of Darkness will seek you out In his blood lust!
WARNING: people of an exceptionally nervous disposition
should play this game only during the hours of daylight! Special
facility lets you save a yame in progress onto tape so you can
continue it whenever you choose.

For ZX81 with 16K RAM .. £3.05

For48K SPECTRUM - £4.95

Price includes ready-to-ioad cassette with library case and inlay, full
instructions, postage and packing. Order today! Money refunded if

not delighted!

Sand cash. P.O. or cheque to:

FELIX SOFTWARE (OEPT. SU12)

19 Leighton Avenue, Pinner, HAS 3BW.

%Jj *l* fcX* *5* J* *i* *I* *&+ *■!* *i* »J» *.!# s£j Jg *J# +1+ J> *Ar %Xj J* J* %I* J* %J* J# J* *i? Jf" *i"
#fv *J* m *n ih ^n #n *!*■ *T* **p «n #n rh m *"J* T* 'T* *F T* *X* *f* T^ T* ^T*" *■"' *Ti 'I s ' "i™ m if* 1

*

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*

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#

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£10 SPECTRUM £13

DUAL JOYSTICK INTERFACE £13

Why pay t U5 for 2 interfaces when you can buy our
Features dual ' ntE}rface for i ust £l3

+ Compatible with any software that uses the cursor keys.
+ Compatible with any software that lists the Kempston

joystick.
+ Allows you to use any Atan/Le Stick type toystick.

* Eight Directions can be programmed in simple basic.

* Free draw program & full instructions.

* Save wear and tear on your key hoard.

Standard Joystick Interface £10

Features

* Compatible with any software that lists the Kempston
joystick.

* Allows you to use an Atari/Le Slick type joystick.

* Full instructions.

Interface Compatiable Software

+ The Wijards * Moz&man * Galactic Jail break

* Warriors + Chopper Rescue * Labyrinth
+ Gold Digger -k Time-Bandits * Confusion
+ Flight Simulation * VU-3D * Meteor Storm

* Space Intruders * Specvaders * Night Flite

* Startrgil * Ma2achgse- * Z?oom * 3D Tanx

* Spectral Maze * Gnasher * Spectapede

* Ground Attack * Leapfrog * Froggy * Materoids

# Frogger * Galaxians • Gulpman • Jet-pac

• Pssst • Joust • Knot in 3D • ETX • Mazeman

• Metfltoida • Astrobtastef • Blind Alley

• Cosmic Guerilla • Cosmos • Cyber Rats

• Frenzy • Nightfiite * 3D Tunnel • Time-Gate

• Spooky man • Slippery Sid

* Only dual interface • Both interfa ces _ ^

DuaMrU^rflaDeTO^^TpSp. Stan^a7dTnt€ffaceLTO+ Yl pSi p ,

State ZX 81 /Spectrum

Send Cheques/P. 0. to.

Jilas Electronics, 48 Parkway, Chdlaston. Derby DE7 10Z.

Overseas orders add £3.50 p&p.

*

*

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*
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*
*

*

*
*

*
*

*

'"#V 3p 5|? ?|? ?J? ?p *f* "^™ f™ ^J£ "5* ^« 3p SJp 3p 3p #Jta 3Jy ^JC 3]C 3jt 3(C JjZ 3JC ^p 3p 3JC 2j}£ 3p

Now you can take a new

AMERICAN look at your Sinclair!

With the new Timex Sinclair User magazine to link YOU into a

re network of American enthusiasts

hugi

Published monthly since May,
Timex Sinclair User has taken
the States by storm. It is
packed full of news, reviews,
programs and user information
, . . linking you into the vast
Timex Sinclair User network.

Remember, this is a new
magazine written from the
American viewpoint — but it
could open up whole new
horizons for you on your
Sinclair enjoyment. Take the
new American view by
ordering right away and see
how the U.S. A, welcomed the
Sinclair!

j Send to: TIMEX SINCLAIR USER, ECC Publications Ltd., |
196-200 Balls Pond Road, London N1 4AQ

| Yes, I want to subscribe to TIMEX SINCLAIR USER at the
| special U.K. rate of £20 for 12 issues delivered to my door.

I Name . -

| Address _

I
I

I Please charge my credit card

| Card Name Card Number.

■ Signature Date

I NB. This offer applies to UK subscribers only. OwncU rate* available «n request. I

N .b. Subscribers to Sinclair Programs rcr Sindau PnjjbgIS should bis aware that Timex
Sinclair User will occasionally neprcuJurp top artistes that have appeared in rair U.K.
magazines.

enclose a cheque/P.O, for £_

The success of the Sinclair ZX80, ZX81 and
Spectrum in the U.K. has been phenomenal. But in
the States the Sinclair has been given a real
American welcome — making the Sinclair range the
biggest seller in the world! The American ZX81
equivalent: "The Timex Sinclair 1000" from the
giant Timex organisation, has been bought by
hundreds of thousands of enthusiasts.

The success of 'Sinclair User' magazine in the U.K.
followed a similar pattern so now we have
matched the U.S A. enthusiasm with a brand new
U.S.A. magazine the Timex Sinctair Usorf

Annual subscription rate is £20. Single copes are
£2 (including P & P).

Fill in the order form
NOW to discover the
American way of
computing!

1 3;

SINCIJVJR USER September 1083

Cassette Round-up

SOFTWARE DIRECTORY

THIS MONTH Sinclair Oner begins a new service to readers
- h software directory. Starting with this issue and continuing
in future issues we .will be publishing a list oi all (he software
of which wc know on the Sinclair market, with the machine on
which it should be played, the publisher and the Type of
program.

If we have reviewed a cassette we shall give it a rating
known at the Gilbert Factor, named after our software
reviewer John Gilbert, Although the final figure k out of 10 it
is the result of a complicated calculation involving a number
of Factors which are taken into account when assessing how
good a cassette is.

tarn*

Accounts (Sole

TrMler)
Accounls (Untiled

Company)
■\ wmi ins (Sole

Trader)
Accounts (Limited

enmpany)
Address Manager
Ail venture L
Ad venture 1
Airline
Airiine
Air Traffic

Controller
Alien Dropout
Allsorl S-l
Alphabet
Arcadia
Arcadian
Aspect
Assembler
Asteroids
Wcroids
Aslrology
Aslrology
Audio Sonics
Auto ( In I
A U(o Chef
A>ersti'
Wd id [i\im mim
Backus™ mo n
Hank Account Sysl.
Bank Raid
BarrQU Quest
Base Invailcrs
Bailie of Britain
Battleships
frcamscan

Bift Match Soccer
Biorylhms/ Pyramid 1

of Egypt
Black Crystal
BlaeV Crystal
Black Dwarfs

Lair
Black Hole
Blind Alley
Brewery
Bridge Tutor
Business Bank

Accimni
Business Bank
Children's

Compendium
Collectur'i Park
Culrisssl Caves

Machine Company

48K Sp*'f- Hes merest
48K Spec. Hestatrest
ifik /A -81 Rtstamst

16K ZX-81
48 K Spec,
4SK Spec
ItiK ZX-S1
16K ZX-JJ1
jkk Spec.

ItiK Spee,
ttiK / X-8 1
4»K Spec.
16K Spec.
ItiK Spec*
ItiK Spec
ttiK Spec.
48K Spec.
16K ZX-81
lrJK /X-81
16K Spec.
16 k ZX-M

ttiK Spec.
16 k Spec.
16K ZX-81
ttiK Spec.
48 K Spec.
ttiK Spec.
4KK Spee.
16K ZX-81
ItiK ZX-Kl
4SK Spec.
48K Spec.
16K ZX-81
48 K Spec.
ItiK ZX-81
lfik Spec.

16k Spee.
48K Spec,
ItiK ZX-81

48K Spec.

16k Spec.
16K Spec.
48K Spec.
ItiK Spec.

I testacies',

OCP

Abersofl

Abcrsnft

CCS

CCS

Hewson
SilveTsoft
A Firm inner
Widget
Iniajiim 1
.1 K Greye
Hii" Byte
Arlic
Silversoft
Suit ware farm
Stellar Scrvs.
Stellar Servs,
Work Eorce

ccs

CCS

Abacus

CP

Htw-'iii

k Gould stone

J M Senior

Sherry

Work. force

MierOgame

JKS

Hilderhay

HildtTbay

Winters

Spectrasufl
Carnell

( :i r in'l I

Newaofl

Quest
Sunshine
P Boullnn

cp

48K Spec- Transform

I6K Spee. Dymoiid
48 K Spec. Sinclair
48KSpeC, CP

Type

Business
Business

Business

Business

Business

AiHen.

Ad\en.

Sim,

Sim.

Sim.

Arcade

Utility

Education

A result-

Arcade

Utility

Ulilily

Arcade

Arcade

Utility

Utility

Ulilily

Sim.

Sim.

Arcade

Mind Gutmc

Mind Came

Business

Game

Achen.

Arcade

Si rat.

Stmt.

I l i HI J

Utility

SI i ill.

Game
Ad >en.
Adven.

Adven.
Arcade
Arcade
Slral-
Mind I lariK'

111 I Mill-.-.

Game
Business

AUmti.

Gilbert!
tailor

6

*

7

*

5
*

5
ti

6

7

*

4
*

*
■

The factors include value for money, the layout of the
screen instructions, conciseness of the program and its speed
of operation, the accomplishment of the task it aims to
achieve, the innovation of concept, and the use it makes of 'he
machine.

While trying to ensure that all software is dealt with it is
inevitable that some will be omitted. We will remedy any
omissions later. Lack of space means that we cannot publish
the complete list in one issue. The remainder of the list will be
published next month and we will repeat this month's one
month later.

Any suggestions for its improvement will be welcomed.

[Maine

Compiler

Conflict

Conflict

(mi nil if- of

the World
Cosmic Guerilla
Cosmos
Copycat
Counting

Co II 111 i 111!

Crevasse and

HoiiEHM
Critical Path

Analysis
Critical Palll

Analysis
Cruising
Cyber Rats
Cycle Planner
Dallas
Dallas
Database
Demolition
Derby D&y
Destroyer
Dictator
Dielron
Disassembler
Display

DIY Book-keeping
Do "Siil Pass Gu
Do Not Pass Go
Draft
Draughts
Dungeons of

Doom
lliin^i'iiri Mister
Dy monoids
Editor/ Assemble r
Educational
I'.ngine Diagnostic
Escape

Espionage IsL
Espionage I si.
Ext

Everest Ascent
Evolution

Family Games Pack
Parmer
Parmer
Gala*? Conflict

Account
Caterpillar
Calpac I
Calpac 2
Calpac 3
Calpac I
Calpac 2

Machine Company
48K Spec. Soltek

4SK Spec. Marltch

ttiK ZX-H! Marlech

ItiK Spec.
16K Spee.
16k Spec.
IK ZX-BI
ItiK Spec.
16K Spec.

16 k Spec.

4KK Spec.

Hewson
Crystal Comp
Abbe*
Copycat
Starter Soft
Widget

Microsphere

llildertiay

lok /\Kl Hilderhay
16k Spec, Sunshine
ItiK Spec. Silversofl
ItiK Spec. Meiiidala
ItiK Spec. CCS
I6K ZX-81 CCS
48K Spec. Micml
16K ZX-H I Comp. Kntls.
4KK Spec. Comp- Hulls.
1tiKSp«C. Winters
llVK Spec Bug-Kyle
|r>K Spec. Custom
16K Spec- ok' Tronic
16K Spee. Work Pnrce
4«K Spec. RAMTOP
4«K Spec. Work Force
ItiK ZX-*1 Work Force
ItSK ZX-KI Myrmidon
4»K Spec. CP

Type

Utilily

Slral

Strat

Lltilily

Arcade

Arcade

Clility

Education

Education

GameN

Bnsint-ss

Hi unless

Arcade

Arcade

Utility

Sim.

Sim.

Busincvv

Game

I .Mlll>'

Game
Sirat.

Lltilily
Utility
Utility

Business
Strat.
Slral.
Business
Mind t*ame

Gilbert
factor

6

■

KtK ZX-81 Woosnft Adven.

jtflK Spec. Cryslal C«mp. Ad*en.

16 K Spec. 11} rn n nd Game

I6K Spec. Picluresque Utilily

ItiK Spec. StarteTMifl Education

4«K Spee. Spectrasofl Utility

16k Spec. New Generation Mazc

4SK Spec. Artie

ItiK ZX-81 Artie

48 K Spec. Abaci

48K Sp*e. Shepard

48K Spec. Microsphere

16k Spec. Hornby

ItiK Spee, CCS

I.
i

itiK zx-ai ccs

48K Spec. MarlHh
IftK ZX-SI Transform
16K Spec. CDS
16K Spe* r - Calpac
ItiK Spec. Calpac
ItiK Spec. Calpac
16K ZX-81 Calpac
16k ZX-81 Calpac

Adven. 5

Adven.

Area lie ti

Adven. ti

Garni'
Game

Sim, *

Sim. *

Slral, •

Business
Arcade
Education
EdiHutiun
F.ducafion
Education
Education
ctmiirtueJ an page 334

SINCLAIR USER iepumber 1383

113

Haccotta RniinH-un

■ —

T

cvniinusd/Tom pa& 133

[Name

Machine Company

Type Gilbert
factor

Name

Machine Company

Type

Githen
factor

Galaxv Conflict

IfiK ZX4H Msirlii li

Slral. 8

Four Rules of

Ciojitrti

48K Spec. I 1 Boullun

Slral. *

Number

IfiK Spec. Micni Master

Fiducalion

Gambling Tape
Games 2

16K Spec. 1 JiiiKiml
IfiK ZX-81 IKS

Game
Game

Four Rules of
Number

IfiK ZX-81 Micro Master

1 (JiK'jIidii

•

(limes Tap* 1

IK ZX-81 J K Creye

Game

Froggy

MiK ZX-81 11.11.

Arcade

7

Game* Tape 2
Games Tape i
Games Pack 1

16K ZX-81 J K Grtyc

Game *

Froggy

IfiK Spec. DJL

Arcade

7

lfik ZX-81 J KGreye

Game

Fruit Line

IfiK Spec. P A Hanson

Game

■fV

16K Spec. A Burnham

Game

FYuil Machine

IfiK Spec. dK' Tronic*

Game

6

Games Tap* ■
Gaines Lape I

CiZIRlCS

I6K Spec. Sospan
IfiK Spec. Sospan
IfiK ZX-81 P Teakle

Game

Game *

Game

Full-screen
Breakout
Galaiians

IK ZX-81 IScvt Generation Arcade
IfiK Spec. Artie Arcade

6

Cahosl Flu lit

lfik Spec. PSS

Arcade

Galaxian 5

16K Spec, Abbes

A read*

rV

Gobble-a-Ghosl

IfiK Spec. COS

Arcade

Invaders

IfiK ZX-81 Ahers»il

Arcade

Gatf

IfiK Spec. R & R

Sim. 7

Invaders

IfiK ZX-81 Bug Byte

Arcade

Golf
GiiliWf

IfiK Spec. Virgin
IfiK Spec, Arlic

Sim. 8
Arcade

Invaders
Invasion Force

IfiK ZX-81 Silversufl
IfiK Spec. Artie

Arcade
Arcade

8

liulihli'irtjin

lfik Z.X-81 Artie

Arcade

Jackpot

4NK Spec. Comp. Rntls.

Arcade

Gobbler

Ink ZX-81 Software Farm Arcade

Johnny Reb

48k Spec- l.iflhlorian

Sim.

Gorilla

IfiK Spec. D Hornshy

Game

Keysoiinder

LfiK Spec. S and G

Utility

Gnashcr

IfiK Spec. KSK

Maze 8

The Key

16K Spec, key so ft

Utility

Graphite
Graph icis Tu-olkit
Great Britain Lid

IfiK ZX-Sl IPA

Utility *

Knight's Quest

4KK Spec. Phipps

Adven.

fi

16K ZX-81 JRS

Utility 9

Knight's Quest

IfiK ZX-81 Phipps

Adven,

4Sk Spec, Hessel

Slral. 7

Krackit

IfiK Spec, Artie

Adven.

4

Great Britain I -id

lfik ZX-81 lli->tl

Strpl.

Kracklt

lfik ZX-81 Arlic

Adven.

4

Greedy Gulch

IfiK ZX-Sl Phipps

Ad *en. 7

Labyrinth

16K Spec. Axis;

Arcade

4

Ground Attack

IfiK Spec. Silversoit

Arcade li

Language Devel.

^

Ground Force Zero

IfiK Spec. Titan

Arcade

Series

IfiK Spec. G lasso n

Educ.

Gulpman
Gulp 2

IfiK Spec, Campbell

Arcade

Language Devel,

IfiK ZX-81 Cainphell

Arcade

Series

IfiK ZX-81 Glavson

1 iin, .

Halls of Things
Ilea Ih rftw

48K Spec. Crystal Com p. Adven 9
lfik Spec. I[f*sfln Sim. 8

Language Devel.
Series

IfiK ZX81 Micro Master

Educ.

*

High Noon
High-resolution

Graphics
High-resolution

Invaders

48K Spec. Work Force Arcade •>

Language Devil.

IK ZX-81 P Moody

Utility *

Series
l.ciip Frog

IfiK Spec, Micro Master
16K Spec. CDS

Iilue.
Arcade

■

IfiK ZX-81 Odyssey

Arcade

Lin«ar I'rogging
Linear Preigftinj"

IfiK Spec. University
16K ZX-81 University

Utility
Utility

*

Hitch Hikers*

l.osl Island

IfiK ZX-81 JRS

Adven.

Guide m the
Galaxy

48 K Spec. ESP

Adven. 6

Machine Code
Test Tool

IfiK Spec. OCP

1 lility

7

Hobbil

4NK Spec. Sin/M. Hsc. Adven.

Machine Code

Horace and Ihc

Spiders
Horace Goes

Skiing
Hungry Horace
Inea Curse

Test loot

IfiK ZX-81 OCT

Utility

*

IfiK Spec. Sinclair

Arcade 8

Mad Marl ha

4SK Spec. Miko-Gen

Adven.

1

IfiK Spec. Sinclair

Arcade 8

Magic Mountain
Mailing List

IfiK ZX-81 Phipps
lfik ZX-81 Hcfftacrori

Adven.
Business

*

IfiK Spec. Sinclair
48K Spec. Sinclair

Arcade 8
Adven. fi

Maslerfile
Mast erf ilc 16

48K Spec. Campbell
IfiK Spec. CamplHll

Business
Business

8

*

Inca Curse

IfiK ZX-81 Sinclair

Adven.

Matcalc

IfiK Spec. Work Force

Utility

1 C hing

48k Spec. Stain*

Game *

M:i|ri\ tlpera lions

Ifik ZX-81 University

Utility

7

7

Inko^

48K Spec. Chalksoit

Sim,

Malm Operations

16K Spec. University

Utility

Integra lion
Integration
Intermediate

1 nglish I
Intermedials

English 1
Intermediate

hnglish 2
lnlermi'diale

F.nglish 2
Intermediate

M:Ufi- I

IfiK Spec, University
IfiK ZX-Sl University

I lilily S
Ciiliiy 8

Maths Tutor
Mujec Chaw

IfiK Spec. Al> Software
16K Spec. 1 k-wmiri

Educ.
Arcade

it

8

M:i/l' l>eath Race

48K Spec. PSS

Arcade

IfiK Spec. Rose

Educ.

Maw l>eath Race
Maze Man

IfiK ZX-81 PSS
16K ZX-81 Ahersoft

Arcade
Arcade

•
•

Ifik ZX-Sl Rote

Educ.

MazOgS

IfiK ZX-St Bug Kyle

Arcade

•

IfiK Spec, Rate

Educ.

MC<Hler
MCodcr
Merchant of Venus

IfiK Spec. PSS
IfiK ZX-81 PSS
IfiK ZX-81 Crystal

Utility
Utility
Adv en .

•
7

IfiK ZX-81 Hose

1 due.

Meleoroids

IfiK Spec. dK' 'Ironies'

Arcade

«

IfiK Spec. Rose

Eimt. *

Mclvoroids
Meteor SlOfm

lfik Spec. Soltek
IfiK Spec. QuicksiKa

Anaiii -
Arcade

b

7

Intermediate

Mined Out

IfiK Spec, ijuiclcsilva

Arcade

7

Mailn 1

IfiK ZX-81 Rose

Fduc. *

Mines of Saturn/

Intermediate
Maths 2

IfiK Spec. Rose

Educ.

Return 10 Earth
MohcTki

IfiK Spec. Mikro-Gen
IfiK Spec, SifYcrsnfl

Adven,
Arcane

•

Intermediate
Maths 2

Muncher

lfik ZX 81 SiKerson

Arcade

IfiK ZX-Sl Hose

Educ,

Namtir Ruiiiers

IfiK ZX-81 Artfc

Arcade

8

ha ii -is roll*

16k Spec. Abbex

Adven. fi

Night Gunner

IfiK ZX-81 Digital

Sim.

5

tighter Pilot
Ki nance Manager
Flight Sim.
l'liuhl Sim.
FoOthall
Football Manager

IfiK ZX-81 Digital lnl, Sim.

Night Flile

IfiK Spec. Ilewson

Sim,

S

IfiK Spec. OCP
48K Spec. Sinclair
IfiK ZX-81 Sinclair

Business 9
Sim. *
Sim. 6

Ntmulnik I 1 uzzle
INnnotnik Vu/fW
0<ld.s-ou

IfiK Spec. Phipps
16K ZX-81 IMiipps
IfiK Spec. RSI)

Game
Game
Game

7

*

*

16K Spec. Winters
4SKSpec- Adtliilm

Sim.
Gms. Sim.

O Level Chemistry
O Level Chemistry

48 K Spec. Calpac
16K ZX-81 Calpac

Educ.

Educ,

*

Football Manager
Forth

LfiK ZX-81 Addictive
48K Spec. Abersoft

Cms. Sim.

Lang. 9

O Level Trench
Revision

16K ZX-81 Rose

liduc.

*

Fimh
Forth

48K Spec, Sinclair
IfiK ZX-81 Sinclair

Lang. 7
Lang. 7

O Level Maths
Revision

IfiK ZX-81 Rose

h.duc.

*

134

SINCLAIR USER September 1933

•

•j iidji o

THE GREAT

HOME ENTERTAINMENT

SPECTRIN .»»

\.

•

n

PT17toSEPT25

■•'■,.

Turn on and tunc in to what's happening tomorrow. There's everything from live
entertainments, video, theatres, TV and radio, studios, hi-fi, computers, games,
satellite TV, electronic keyboards to the latest in laser discs.

the time; 11.30am- 9.00pm (Monday Sept. 19th 5.00pm- 9.00 pm). theprice: £3.00 per adult.
£2.00 per child (under 12). Take this advertisement to the Great Home Entertainment
Spectacular and you will receive a £1.00 discount on your entry ticket. Not exchangeable

for cash.

SPECTRUM

FOR

YOUNG CHILDREN

COLO JRFUL FUN EDUCATIONAL GAMES FOR 2 to B Yfi OLDS
WITH SUPERB GRAPHICS. SOUND AND ANIMATION

SHAPE SORTER ie/*8k 525

a animated programmes Xo aid sfiape
recognition observation and size sorting.

COUNTING 16/4HK 5.25

A grades programmes good as a lirst

introduction tn numbers.

ALPHABET i6i<or49k 5.25

Full screen pictures for eaon letter,
with an option to present lower cue.

ADDING & SUBTRACTING

16748k 5.25
3 animated programmes introducing adding
and ssih'rHiiting.

NEW

PATH FINDER ie/4flk 595

4 compelling graded games based on mazes to develop planning and
forward tn inking. A dtfferenl puzzle Bvwy tfme on each programme
Each of the programmes appeals to children over a widu afle rargi-:.

WIDGIT

SOFTWARE

48 DURHAM ROAD. LONDON N2 9DT
Tapes available by mail order- prices includes p.&p.

Advertisement Index

Afif Hardware 30, 31

Abersoft .. . . 22

Addiutive Games 86

Afdec Elect rtmiea Ltd 97

Altir-,t*di Engineerinn ltd 54

Artie Computing ?3

Basic** 102

Bi-Pak - 113

BrtdgamaBter ■ , .......58

Buffer Micro Shop 1 13

CCS 42

CP Software as

Calpm: Computar Software 45

Cambridge Computet Stora...... .....2 2

Cambridge Computing 96

Ctf mfhtiell Systems 32

Csmell Software Ltd 93

Casearia Software 44

Lhalksoft Ltd 53

Cheetah M nrkering & 1

Curiiuueaund .130

Comoutw- Aclri-Ons 6. 9

Computet Shows IMonhemf 110

Contrast Sofiwdra 110

C P Spttwaie 130

Crystal Comput ing 20

DJL Software BB

idK' Ironies ...36. 37. SB. 99

Ltean Electronics 38

Digital Initiation Q3

EasL London RobotiM IS

Educare 81

Folix Software SO. 132

his Sixty ...... 12b

Pjrming4ir, A 38

Fn.jruam Computers Ltd 58

Fok Elsctnwic* 4S

GrMt Homa EnrtBTtainrn-ifi

Speciacular 135

J K fjiev« enterprises ,, 50

Harlem Systems Ltd 90

Hartland Suftwars 53

He^tacreat Ltd 121

Hcwsrm Consultants 62

Ir>[£i1flce .. d4

Jiles Electronic* 132

K Rum 86

Kelwood MeiiHriy Ltd SO

Ktunpsiijn (Micro! Elcctmniei 2

Kernuw Soft ware Scrvi*-** 44

Legend &D . 6 1

Load Runnel 131

Longman Group 47

Lothkiricn MX 32

MF! 17

M acqu ilt»n Electronics 83

M agenta Etactronics Ltd 120

Martach Games 46

McAlley, B S .. .130

Melbourne Houe* ......-, ,7, 43. SO. 57

Memt>(>n:h Atld-Qns ,...*6

MiCrfr-Z Lid , ,. 30

Micro Matter 52

Micro Pcwtr 14

Microl .. 87-89

Microdot 300 100. 101

Microsphere .. .121

Microtssl (U.K.I Lid 102

Mikro G'^n ..52

Mi i*e ward Ltd 88

Naw Guncrfliiyii <J

Northern Htemier Exhibitions 92

Odyss-ay Computing 52

Or win liullwiia 82

Owen, T J 120

Ox lord -Compunsr Publishing 14

PH Scie-niitlc Pfoducts . -.45

PSS 139

Parsons computer World Show ,94

Picturesque ........ , 38

Print 'n Plutitji 4

Timet Computers Ltd 18

Puffin Books 14

QumI Mii:ru Software 7S

Quickeirtfa 140

R a R Soltware A3

Red Shitt Ltd .... 121

Richard SfWphWd ?kitiw"ara 24. 25

5ilv<;rxoFt , 10

Sinclair Research Ltd 115-118

Softeach ...120

Sofiek Software 58

Softel HO

Sodwate Library 22

Software Supermarket -^

Hoi [ware Workshop 12fi, 127

Soectrum. Associates 106-109

Supurmitf! 137. 138

Tandy Corporation.,,.,.,. 38

Tasman Software , 81

Tc*gatfi Computers. ,., 32

Timedata 113

Tutorial Software Hi

Universi ty Software .....,,, *4

Vortex So't W#r4 ,122

Wjitsoti Software Servioes 81

Winters L-.d . ., 64

Work Fore* aa

A wor

ctiyity for you

ve a ZXaO, ZXBl or Spectrum — we can show you
F ar"more to your Sinclair than you ever thought possible-
's the active, lively world of Sinclair User — the first magazine
written specially for everyone who owns or uses a Sinclair

computer.

Every month, there is a whole range of games, business ideas and

bright new ways to learn. There is the Sinclair User Club, with

special exclusive member offers. There are technical facts,

development news and advice, plus hints from other users and

answers to queries — in fact everything you need to be an

interested, informed and ACTIVE Sinclair user,

There's just one problem — Sinclair User sells out fast! So inaice

sure you don't miss your copy: order it today from your

newsagent — or complete the subscription

form below and we will _ -

send it to you direct, every month. ^ ^ — ■

et°

---TitfP**

tsV

to*

t-

-r^^SE** 1

d.^TloCV**

^ Q ^V** eI

■*»$£*

iV ite

VfrS^ZZ^*

130

SINCI-AiR USER September I9fi3

THIS'LL
TEACH YOU
A LESSON!!

(„.or two)

m J LLVEL-CSP f^AaSELtta ■ IT l.'f *Mt BPECTHUM

TIRED OF JUST
PLAYING GAMES?

TIvmi pu! v* ijr ; * tD =Drnh! PrtP*5"' ' lst w '*^
■nor range of tfflay to operate, *ur*i»<K"ial soft-
wvar-E. Tiller intl"«?1i:

IrtitflHll Rhi

* PA0*pro Syatvrn

lir-lii vrtr-HftHe Utility prvymi'rtS

■ PimmhibI Ri^p""'**'

* ShuMilnfl Liat l™l*i.

F-dt ikji la-lw»r ^iis.iHigue- aemd ittr^jft *ifl.b ta:

5D Micro S^b***™*

PQ Bo* 2*. Hiichin. Harts EG4 flAt.

And dc *wvtu ra«»l cDfpputii'wjl 1

+ ~t^™.-^jrcL#ti-'j"

I tin/

#

r><o**™: 'i"?"*^ 1 ** TiiH« i-ji

IP2

rth i n kl eobcotpn*
bun hi Software

i^oi si|R nr. viwk>uii>- "%i*d.

ZX-S1 - SPECTRUM

ORIGINAL SOFTWARE
URGENTLY NEEDED

Pletlie tenri 1npH and 5At wMh (J^t-rlptinn
hor avnlirafion. Good foyolliet.

AMELIA SOFTWARE

H Dnln Slrflnjl *|tw Mnrske,
Clewiland T51 1 S(M

5ELEC SOFTWARE

"■*"""

1K

ZX-B1 GAMES

IHtBCS^ AVAN AHLF

1

• M*J* CLIJtZLCH.'EUPIPSRpAKnLJT
Suparb Pull FiMture imaa- c tlH HT gun*,
riufi hip vxwn BrK-atujui £ 3. SO

( THFIVu'flDtH-J.iTlMLKfMB

Diignrtl ftfijtjc *ivafcr^. p*ub a i^w Milr*-
rhlliiMj game £3.90

P ZJi PANICS X-5I1UASH

Two new tog myMiri id actan

umwra f 3 60

* MB C«TALDGW

PtaBM Ml>'l "!'-■ I i--.'«1 li'-

Nftmn- . ■ . ■

> eldest d"wn*''PIJ l"n S

5ELEC 5QFTWAHL

37 CauneMt Lot*

06I-+2B 7*JS

HOME STUDY

PROGRAMS AMD DETAILS FROM:

TRELEIGH WOODS FARM
REDRUTH CORNWALL

4SK SPECTRUM
PHYSICS O' LEVEL A.EB Syllabus 05 2 1983/4

« TEALJimG FWOGRAM5 (itiekrtfiny jiirmsj taO iLHOtLitrj' Km *lL SvLUBUSKi f s*tj

8 FAPEfl I |ai«ililpt* dioreH PROGRAMS 4QQ (|utsu1iij"H |C3Q? L5.15

1J PAJ^H i ijirncUcnll PROGRAMS 39 mrtailoiK IC30I F5. 1 rj

B PMER3 iLiHKjiviPfliJflKftMSi 129 nuHlwri: IC30) tE.15
AJI arngrairs fvatvi? rn^r^nr AnA^riirR, iristant CHplDnalicv;o, uruu-rtjle gi4d$ #6lin^*i«.
WtHEN VOU Bt.IV TH£ COMPLETE SET" 12 « CfiOi £22 00

WE GUARANTEE YOUR EXAMINATION SUCCESS

OR WE WHJ. HFF'JND TltF FULL PUHCHASlt PfllCC

SPECTRASOFT SPECTRUM SOFTWARE VfllTJE FOR MONEY

Assassin. A new original TFfal' time graphic gaine
where you are awarded assassination contradK
which yon must complete to reap the rewards or
suffer the penalties. Could you be the hski
Jackal '? ES-OO Biorhytims /Pyramids rf Egypt
16/48C £4.50- Eftgia» DiagmoEtic 46E £4.30,
Character Generator IS/4-0K £4.50. Spectrasort
1 6/ 4BK. Very fast m/c sort £4.50 M/C Tool Kit
deals with tachriica] and acteen probLems E4.S0.
Night Rider m/c driving program, £4.50- Cheques
and P/Os to 5PECTRASOFT, Capital HrKuse.
Market Place. London W3 6AL.

EDUCATIONAL FUN

FOR PRE/PRIMARY

SCHOOL ACES

Q^ibIm. — \ Ct*CII,AliT>S l^ ,l,,, ' 1"^*:^ ' " "!•"' ! '"■
ing lamilisu ^LjtLn. ■'Oir-lin[;. .xilnui :>-i^.il;iLiI^,I1 ,
i III- li-|l|^r ■NLhlUCHtit.

Ofpa^att — *ii.TT f.ir hiiiI ijmijti fnr faun*
■ LiliLri. v.ii!i oupwsrto wixtli. Vtty tnwnai.iinq

I ., vJiulik' aid »n nw&ng Mini ij*flirafc.

On, uuim^ are d'rii;i^"i- '" .lir- h&^nc^i 5rj.nil^"vl*'

J_«t> amm-iii . I nni|rfiii> ui IJi-l' u

full ihc i>rS|n^ir Hiuiid and munr

l/^sof varii'iy :,i.l ijn.l.iin qLexiofii

■ l»d diFni-.iliyk>^li
Iheijui frrdlnit cm wiim; rrplin

MKlp ill fbv miikIl &m. krV

E U^mlifl g E^t^i' "oariiif jfWMni
III -h.in iuvi i hud -kJ J - -^» wit H Mn ' ,_ ^ ta**ii*e
ihe-pii' RNTtHTAEHlMG — iln- «mi->JuI n»jie
io cdu*"»i ^inal in hirv^iYitnv

(ii^i[£DVC*T[iJNiL VALUI I! tl SFi prrri|H:

r :in-i|>.H-.'j' -M". ni>V- Spctnim m

1*B £ jlWirvi! . iteStVnhn:, H,iy ijsr,

ltriin:rw. K-ii. I.MT !il»" .

TO HELP VOU

WIN THE POOLS

■PQOLSDA.TA 1 " roiulis Databa««
Ctirflptaeg rdr.rjrd at a!l Enu^ai 1 ! FyulUill l.^nyiFfi
rhiiniliK 1?IV^ H.I. Httna-mr. sconftft Wl AiHiiiflK
dflia -a* Qyftr lli.&ii malc^nre. Irji ^dol fl ftHy»H .
S**i*jIh rntfrnat. with atartwr aphIvb'3 pri^iArtii
Aivii Lnudanci: ncrtci.

Spectrum .'ZK-81 '16Ki
T i^iK 1 2 year* dsi^l I" 7 HCV
Tapts. iB vHar^ dsl-al F I ? :='■■
- P00LSW1MHFH ' (TCiln pL>1n:tar.
I lexiLle Lfijiiiirvtil6 prermctKHi p^aniaT. wtfrft
wfiri:r>i;yy ^" -riiiiyral ID- rn*r database Pru-
did\ di-awfj. hwa^ fir hamf-i. Can be- 1UP94 \<j
ifoif 0**1 ifaTiliV-tfl ^on^ula, dt uxed in ihmpN
i nude

fli.OO

S A - E I-.t ::nlHik 04 bAiVl chnqijc-s.^O? It*
Swi Riifl WMrA
ST Ci>fnL;ilk>f LftJifl —

I'Iih-. Omft mi:

RAM PACK
REPAIRS

16K
SINCLAIR RAMPACKS

Repaired as good as now.
Just send v our rampack,
together with a brief descrip-
tion of the faults or problems,
and we will give it our imme-
diate attention. Why buy re-
placements, or wait for
repairs?

Act now and get your com-
puter back into business with
our money back guarantee.

Only EB-OO including VAT
and fl.50 p&p.

Send unit with PO or
Cheque to:

Zeal Electronics Ltd.
Storforth Lane, Chesterfield,

Derbyshire S4-0 2T2.

£p*ctrum — ZX-B1

UvftilNMrturnj 1, Nau^ Kflyboard rur^s hoi'

Pi L>mem bc«';*ci wllh the P. R adadt-nr Ivl
so-nenng nc dismaiUling (t*( ;ili-Q3 ir.
pJaoe. Efl.95 pl«as(r Sb\s medel

ChequeEjP.O Id

P, R, El«tr«*ii(;»
14 BrEtby Close.
Doncastw

Seulf Vfyks .3N4 6EL

FOOTBALL POOLS PHEDICTOH

^?

For 14K iJtfti

3 + 3 ii^^lii-irti a\ pfodictiop. {nir mpic^**

pipyHi:! yili! d!i*t. Pnngrir*] Ufly in r.irj!#: ftt
pi^fyi^i-if.n liVorys dp Brliah iniT Auij^iftliii"i
ry^oIlK Oniy t4.a-b.

DATA FILE

Hallt* BX> Cnlrki^ pnr mfH Adi1'#li <JCKA JNVJ

iabeflfio: p^ilpna . CnmrnEfi kim 1k^<>. Piviihi
<ip^0Ti. Id*«l 1ar tmall busi<YE». tiuh* ar hoim
fit- IKK U 91 cilv L* B5

Ullrir 5nll»lrt.

S6 Ynrole-v W-owl Fto«l. M«ul*r.
Btrminq^om. Hi;i S.m

IVYSOFT

h iili-.i-.i-il ii amajiBicr <Imi h fiM iftovwd pt,

pi-MTLvMK .1"

Pb New ttvMt

PlVrMMlh

hUil orit*-r ard ir^ihiMi. ii-.;i,imi
iKi jdr 1a:

■PI flppv-r Diivr

N>hnd H r

Dvvciii

lT»?*rp*««»»w. |Df7i5*J 4H4I

--iiriiH ui.r iu'h aoMUJM *p *'ll bv nM-'i'i'^

,| lt|% riiuiciiin! hiA ill -Mdfll rVCHWd dkirMTfl
JLi.iCii-,1 HbjiIv J W Sf]tCli*um pfO*l*iTM- ii ilcrh
.■I. E _ I ■ III ,; FKMI ill ttlQM *lt*-rliM^lI 'P 111* '■MJlJiJ-
rtiilr M-lriliEin vi BirOpHAIrlf krT nrflff MB>
CfDI. untrwdiftg /S-H" 1 4il*^lhr>-»P ill »Hni; l.lF^f-
5Af lui riu> lr## it piflt CJlllC'KU*

CM) ^nnuji

^n«-n|>^^^r■.| 1 <:nl> f I IM ' |-ii. *■«. hAj Ji 1 1^*4

iv: on >n|iirifjir^

UVIL COMPUTING

SUHLMif NEW SELF TEACH WiOGKAM

FlmZ^-81 HWl Sp*7lnum
TR9aP VidwO-nb

#Frjrgti! vpnjr p«i prcup-jrnmmifl DfOt^fmfl. Th* pro
grjni irfil rtiALp II jLi (:*#*■ *

- - -I *■ * *■ -i

Cnvyi ftflBV*. BOHlng Barircfik-m, Country. EhciBror-
■ Prihi-ifi iutli. Encr Trippinia MhI-j. iS-i*-*^ *1i; Vih,
(L-Mrl rtirlh ?hnn F-fTpif- prnnfj^-ni. jr« l^drj yp 1q- T^ji
i*c*.ri|i piog'smn wnh. iwipiiifig DHp4««->40 r> 'lfU.

. . . . . * #

A -ii- «c ivOf p [KODf-tm you ithHk' copt -i^d nm.*

■* it fTJU HAVE COT r*? IfVTCnTr^* 4
BiH l[ i& wJfTltri jP- fcJ-lfi 1 wik 1 ihH ybu t*n nul Uit
al'jtk

rhm Drofli-jrn ri«f; h*^r. r^ftr IP«9fJ PW Th* pun Bf-

iTKVTirii by SD dafnHDC jod bpmwI but mi Lttan ana

■ft* hJv£ rOI l>Kiiivb£l JT-. AdvtfM rkfMHTJ

Thft plOtffn it Out Own plOdu^t bih] ife i'hVI J

lltlll'l Ml-r Oll>*T a-^OTlB Full TlUIWf ImlH HLMIxnlBa

(4.j*i i fif. I PoJUtft £ PltLkifi^ liEila whii.h :*-:r:ii

puLBTl

51 WhitcHfffj Lvwt. Ripon. YdHu HG4 2LI

[>[NCLAIR USER September 1983

137

SPECTRUM AODPACS

VERSA THE: JOYSTICK INTERFACE
Easily included in faaifz geme-5 pK>Bra"-!B. i iv-
cJuding thoje '" itfeiJBJirwj:. I'U hHxfitalB, uai-
jko be- uhil at B:.ti(/t*r Aianm, etcl (uterfaLe
And demc- n'rw^iA £li 9E-. Wrfi Alari J.'S
El a. 95.

TAPE CONTR04.LLFI

No* yoji E|art^irLTn can stnfi and Ftf? VOW
Trc*r(in tfiflriing ma proGram of v^v flhoic*.
Aii^tay Oalp • IL ' im "P* f ram wi?h" D piogr^m.
LEO ki'hi merer, perfect LOM.'SAVF ™lrfyiur
toac iwiwpnii P^S* <n [D " EM Mckel it- 1 re-
corder £1S 95
IEEP BOOSTEH

With LQAD.'^AVb iwnchir-j £6 96
PRDCiUM SAVER

Ai.piQmare battery back-up No irH>ft crashes
^.i/: En power tailjrBE' £5 9S
All poducr.! iulv ctSSd- 5AE fur date sheets.
Ma' u'dBi ee*J, clwqucx payable Id 5 F lin^

IBTBO'I

AfiGKAC E.(.ECT?oD*(IC5

i2 Wailing SSreoL T<r*C**W,
NrxlhennNHlT 7A.F

HORNBY SOFTWARE
PRO GOLF SERIES

i PflO GOLf Spactrutn game, ifiKand
48K H*-jiii5iic game, N'lgNy popular
9-hoJe course. Choosii yum own club..
miss ihe hunkers, witar, out o*
bounds. £4.85 Incl, p*p-

2. TROON SpfiCTfum game. 45K only.
Highly skilful. IB- -hole cKampionship
course with graphics. To any tiandk^p-
As reviewed in August Sinclair Usw.
E6.95 Incl p&p.

3, And no* ROYAL. HRKDALE 1983
BRITISH CHAMPIONSHIP COURSE.
Spectrum game, 4 8K only- Play **rtn
ihe pros £6.95 ind. p&p

Hornby Software

21 Pinfold Mill
Leeds LSI 5 OPW.

e,aj ••*•*•-■•*•■*# *•**•••»*"
Tune ynur TV Tm optimum pcHursiiHiice by
using TV COLOUR TUNE" -an ralu
rational and inatrjcttve prOfliam fat the
4Alt Spectrum q.^ng CROSS HA I CH amrl
'ninUP-BAK SIGNALS With relevant
tarCXL-UC of the phvsica 0' colour TV trans-
mission

E3 75 eftcr, tir get una

FREE

m Hi wury

3 titles ordered

CHESS

«BK AfiTIC

E9. 45

CHESS PLATER

*8K CfS

re .95

TIMECATi

4flK QS

E5-.B&

MINED OUT

4flfc OS

E*96

STAR TREK

4flK fUR

£4.95

MICRO CHL-SS

T6« ARTIC

E6.B6

COHSLbMAN

1EJK ART1C

E4.8S

tOLF

1«K R+H

E3.7&

SPACE lUTRUOfcfl

IflK OS

£4.95

METf OR STORM

16K OS

T4 95

VV= ore now a nifllo* S-iurce of
EDUCATIONAL programs ranging from
INFANT [□ C5E''GCl, Top rah; m;.v«e *nri
comprertensrve aupp«V only Trpir'.
LOCATOR, 12 FamhBll Drive, FtedUnlaa,
fcssej: lGi 5BN Tel: DI-BbO 557 5.

The catc for classified
advEtrtisiriy in the
Sinclair Superman
is only t9.00 pet

single col^rnn centimetre,

ZX-81 REPAIR SERVICE

A1 asl nu injHd lu wall lor ivrait:.

Mod yi>ir tanfty ZX St Tor a fml

-triable najlAiTi

Wv wrl i irpeir *rvy ZX 81 fcilm Ready

Built Unit.

PV»ub6 (>«H:;iih*i ihn- faull briefly aivJ

&cnd a ufieqLW.Vualul Ofd^l in

NE*TT COHPUTTiH SrSTtlMfi

n l4urvmt rload

EiiylHliAld 4>r*An

Surnay TW2D0QR

ONLY £15.96 * pBrp 1 1 K
lully guarantfl^d

ZX UPGRADES

T6K Spetliuin crwrvena llssyt: -21
upgrade no 48K 1(,ir ilb Aliernatiwly
sand UK your Specrrum (k(;y'>'"«iJ «Jfiit
only, not puwer supply^ and for f.$t
inc. you gat upgrade piux a small mod
Dm br>»rrt to allow video signals, at edge
ctmrtector (r»ot usually availablei to
dfiye a mmittcr. For video mini only
::i:rnJ -keybaarrj unii pilus £5 inc. Alt hy
returni rkisl.

ZX. OPGHADES. 2E2 Ban4t.h<mrl Hr>ad,

Northjllerinri, North Yorkshire.

DL6 1.JE.

16K ZX 01 plus primer, paper and liiadr, and
intkjriirtg £120 wortk. of sufiwaia, s-g, 3D
-Monster Mw?, Ettack Crystal, Football Wan-
agcr cit. Cost £220 will occnni £110. Tal;
Epaom 2442D.

SINCLAIfl BUILT 2X-B1. atill und«r guaran-
tee pkjs Sinclair 1 SK RAfVI pack plua games-
tapes onri rri;iyatnni. Cost over £1f>0- Hifll
tor E6U o.n.o. write: rmnwnn Fawr, Milwr.
Holywell, r.livyrl.

16* ZX-H1 maniuail, i-eads, mnnjjrinns and
add ori calculator kcyb-uaid, all at- new.
Games (ncludiny uataccmbSj we'l worifi
ov^r £100, bargain fBO nj.ri.a. Conlaci
021 -308 73S8 (awnings;.

16K 2X-S1 with i:unsrMa. built in keyboard
and power swdcfi. Over £100 wurth of
software. 2 fchooks. grxsd condition, wortn
ouur C20O, bargain at [IPC <?.n.t}. Tel:
Southampton 10703) 4473/1 .

WANTED. Spectrum rjrjiu calm rial and games
programs, I lighter pucea'commission p.-iiri.
Lpi li» make money for youl S=r*d yc-ur ispea
With S A.F. to EbhEX Software, 1& Hursts

mans Drive, UpminstBr, Essei. UJPMH
20508

SPECTRUM [*SJ0 pfUS printer £130. Soft-
ware i:nll«cilon of the best Spectrum pro-
grams available [Nearly 50 cas-scttcs)
f 1 . 50 eatli. £enri S. A .t. lor I i±;r to- Richerd,
+0 Dtimpton Park Drive,. Broadstatrs, t^crvt,

SPECTRUM Mi'C SOMVrARE. Unique. 32
lines ol 84 characters using B/iSIC print

cihiiirnaiiLf in yuur iirO^jiailii, £3.9G. Miiiila
Aii.ic:fc. laxL areade yania, £3.65. Specify
1G;48K. P Reynolds, Longficld, Crgnbroak
(inmmrin, Kent IM1J 2AD.

4flK am. 16K SPECTRUM
EPROH CARD i«l

1» (FflDHCMHl iw aw HUH mm. w ™ni IM ..I U J
1^1, .r. a w **h- fii= E*-C4i*:iiS W«*i -JAip

fats, rr — ■ til a tbi-h.. Hnta nsta :i»

1m C h Oiw < 13* n.1 i. twl IE.5S

rMCUlUBES' EH0W IKt«l

In Ti| ^h. jjrFf*>»r ROMWI! N 11 £ L-1- SllJ *»

Vnm. imrt- .. nniS. EuSUE hi.i V»ni**« IUit. *■'
riryenri. Hh-fc ritoi baihOJii^ia tlu^in rrmr 1 . 1?«*v
S.I.

■•! ;s: taiwaj DM* wnr.ww«!B ii;b r-j. at is atn

'3>. IfTTSl rrES*KbWBlE J irftftH IfB B.

i jLiuiftBiE m' irwjui URL fmniM «i na*a

IIII.HI

n.aitli 'V qpiui'fiu

DIII*E E.LECIinac.1
■ »MJ :*r*oftit. ChihM

in -;j(H 7isdi> ■■ «- in is*;

ZXiSI SPECTRUM, DRAGON,

BBC AND VIC

SOFTWARE LENDING

LIBRARY

We have Id* liir« 1r^r-5ftp I nu. f?r*i i orflgrami Iflr

your oampubt,

pafcte TaaraWr^Hp I^m 'fun ihi: ec*1 of ,i single

qnr-m:- Eirippi vcil. StlFTWAHl- IS-MSINC,

ilftHAHV ir«:ir,|j?r5l--u lit, i- klium #"d ™hm

BMW1

frund ehaqiio dt PO for »to:

S-LH- 1 WARE LENPINfi LIBRAH>

Hfl eku 3, CattlHTrjrd, Weil Yurfc*

Stzbna iuimt. address and

onmpulor type

Ati ?.?jwa ■■vHi.' ^'rn ,-i:.T,-ii,- | ^:-rrjn-is'j.f^ii'>iriji

ZX Spectmm 16 Or 4BK

HIDDEN LETTERS

Reading tomprahensinn and spelling garn*

IvlONEY 3 levels
TELLING THE TIME

6 Lavels, i;li>Lk for c»iild tn set
LEARNING TO READ 1

4 Allyraphies pr« mading games

£4.^0

Ail<: 5 an

Age 3 1 D

£S.Sf>

£5.50

Age 3

10

Age 2-5

L5 50

1 BK ZX 81- rjornpkte with uri U iiiaL [rntkng
ing.. power supply, leads, manual Man*
t^pCS including 3-0 Mrjoslijr Marrs, rii^hl

Simulation. Compiler, etc. Bargain ai EM.
Telephone: Martnw (Bucks I 494fi

16K ZX-81. manual, leads. 42 key kav
buard liftBd. inverse virkm swrtrih. 1 S earn-
Kites, total valu* new over El 50. only B
montriaoad, f 7S o.n.o. Tel: 0491t5l 265S
I'Oninni

1 6K ZX-8t "ZX-BOMBRALLY" motor rally
raCB with spflCtaculair 3D driver's vinw

Also "iX-SUrtHTHEK": both rn.'c. Cn-
sette C2.9S each. E3 35 both, sag lor
ilirtail'j: Rut^frl Ariuilaye , 105 Br amrjule
Drive, Saeston. Notts NGS 1DU

16R SPECTRUM Arivenluro yarn*. In Ifltee
parts More thHr> 4T»t c-f program. Figril

Mmisler? t1i:. tvi^iilually Orftfuia. (.ireal 3-
D graphics... Only £6.00 to: M Dinon, 22
Cliippcrs MnarJow. Allokl- Surrey GU9
SHU.

BARGAIN MINT add ons Sinciair RAM, f 20
iONXSl £1S Pcrsi included. Prions 0236
35451, except Tuesday ■
LOCK-KEEPER ten 4BK Spactrum. An edu-
cational program to promote rnasonng
skills for aduits.'Chilfkan. Fun at tame at
ichool. £4.96. Cheques-POs io J. J. Don-
Ohcr, 33 Upton Driyr:, Chester CH? 1 BV

TREBLE CHANCE pools forecast no. pro-
gram for 1hi: IfiK 7X fl 1 Priiven winner

Special introductory offer. For quality cas-
sette with full instructions, send £2 95 to
M. A. Geoige. 12 Donne Avenue, Spltal,
Bebington, vVinal L63 3VH.
METRICATION explains Ihe mKtric syitam;
CONVERSION changes everyrjey imp^rnal to
melric: mRnsLiremmfs and vine versa. Two

invaluable programs for the IfiK ZX-81.
Only f3,B5 Irotn- I Le&ocq- 18 Ly/tton
Avenue, Leictiwnjtn, Heiii SGG 3H1.
1KZA-B1 / original Cassettes Ai-h^m lo/tj
new programs pr^r <:ass.etlK. F url-Fanf , Catft,
Penny, Worda, Numbers, Andy. Task Force
£1 sample cassette. List- S.A.E. Wilharria
Sluftvraresl, 51 Melbourne Court, AneMay
Road, London SE20 8AR

ZX-81 WITH 16K RAM pact, Ferguson taije
recorder, Hitachi 12" BfW T.V., complete
hon^a-set, icIRail 1nr t:*-y«nner Leails, rnanuail
and magazines £100. Tel: Rayleigh
773473 -IFsseil

PRINTER- ASR33 teletype, uses plain paper
single stieet or rolf. up io 7 J columna,
complete wnn inTerJaca and soliwata.
Ready to run on 1 6K 2X-B1 £37. Tel: 0243
S53EJKJ.

Reach an estimated readership of over 200.000 users
per month for as little as £2.00'

Or rf you are starting yaur ttwti small business arJvertis« in the supermart
foronlv f 10.00.

Yes nil yuu have to do is fill in the coupon ttelow including yn-ur narr,E>,
addrri&s. and/Or telephone number and send Id: Suparrnart, Sinclair UsErr.
ECC Publicetinns, lflfi-200 Baits Pund Ruad, London N1 4AQ.

MBKimnm 30 words.

Your ativeri will appear in the earNest possible edition.

POPPT PROGRAMS, Hictirrvond r*0M*e- Ingteton, Camfu-nnT LA6 3AN
CflnipL<t«r Trade Aaaoclniipn Mrmliw

Name ..,.
Address .

.Tel:

Have you Included Ihe fee ot EZ.GQ or £10.00?

'for second hand sales only

-1*41 4iJwIi»lji>&* 1 : Vl4IHO<r ^uirLVL ilH iiplr III «m qicl ui xuipiiifaii Hh*«U «"■*"! w"«ml viiv^V m < WHt
Aihiimunjni Jia mxwp\wJ MJtrei I W D«*aV* Ol Mrr- ZT4 "* ^^ 'Kfir o* T« AiKw-liHniBrr VUiwgfli w ««■■ npil wr tral
4Kj DIBW AhluiiTrthplMuqnn I'm l'iu(r«il>i>t hu >rK 4i&* *4p- *^ih 4ifr l-flT- Pi r*^* v-hji*.*i. m. fr.ilw v xit tjti [ixtaM^
la- pmiln' biiii>> T'ri A9v&^l>5t^ |h*l' rnri/tn-itf ihn H-hksha^i m -ii^ikI o^ ht-v Uh^ «uil -Hid ikwhi *-^m<u L-y. 0^ Wi
(,-diin.hni mrinmi iiibUm ui i-iiU-jj ««*ivrtm In r«r ^■■'^P«^»m nuhliiwll +w riu uhimuri. ni iit, in<-iHi«w"1 or
..NLiyiitfH &Y1H1I w iliwfln IhBwn I ni p kct| ci Mff uiiHr w^' H dHflltd W H «1 KC-HTIinor M ihAV rmlraitii

f38

SINCLAIR USF-R September 1883

PSS...

ERS

M

v

O

I ( <-Tl

S

R

SK

Perso ml Sofv^are Services

I I L

After the huge success of M Coder
(THE original compiler for the ZX81
and Spectrum) we have gone one
stage further and improved it to
make programming even easier!!

M CODER II now handles STRINGS
(NOT string arrays) as well as 95^
of all integer basic, and we have
made itei/en easier to use.

The list of commands are too long
to print here — but we are so sure
that you won't be disappointed,
we are prepared to offer a NO-
QUIBBLE GUARANTEE.

If you are not complete!]/ satisfied,
return M CODER II wifhin 7 days
from date of purchase and your
money will be refunded in full -
wifhout question.

SEND PSS A CHEQUE OR PO. TO
THE \HLUE OF £9-95 FOR THE
SPECTRUM VERSION OR £8-95
FOR THE ZX81 16 K VERSION AND
WE WILL SEND THIS REMARKABLE
NEW PRODUCT TO YOU BY RETURN
POST,

TO PSS. 452 STONE Y STANTON RD. COVENTRY CV6 5DG. FOR INSTANT CREDIT CARD SALES TEL (0503)667556

TRADE ENQUIRIES CONTACT JOHN FLETCHER,

^

* OFFER SUBJECT TO AwftlLABIUTY

%

Lose yourself in the
Goblin Labyrinth
amongst Demons,
TrolEs, Undeed and
the Evil Wizard
vein or.

A Warriors and
Wizards, Sword and
Sorcery Adventure
Runs in AQK on the
Spectrum.
Author:
Derek Sr

sophisticated alien

maze in a search for

the aartifsct'

A Unique 3D Arcade

Adventure

Runs in ^BK on the

Spectrum

Author:

Mike rvioscnff

£5.95

_EEB ART

High Quality Art/

Design program far

full versatile

manipulation of the

BBC's extensive

graphics ability

Paint. Draw, Abstract

Instruction Book

Included.

Runs In 32K on BBC

Model 'D'.

Author:

Dave Mends

CI 4.55

Q

TM*

Falling through a
concealed cave
entrance you find
yourself c@ught in a
fable full of horror
end Black Beard's
Treasure . . .
An Historical
Adventuire with
Hi-Res. Graphics.
Runs on48K on the
Spectrum.
Author,
Hrohn Kcneally

Ski thru' Marine
Maniacs, G & T"s»
Regattas but beware
the Great White
Hungry 1 1
Unbelievable full
screen display,
continuous sound,
'impossible' colour.
Runs in 4SK on the
Spectrum.
Author; John HollJs

AQUAPLANE 4BK Spectrum E695 i

XADDM -48K Spectrum CB.95 □

VELNOR'S LAIR «48K Spectrum £G-S6 n

SMUGGLERS CDVE 4BK Spectrum EB.95 D
3D STRATEGY 1 BK/48K Spectrum £6 95
BEEQ ART 32K BBC Model 'B' G14.95D

WAHIMINQ: ThB» p engrains are sold

' i J iJj 'P .w.fljfl.^M i Mmw

which gn available on request.

Copies of

PLEASE BEND ME THE GAMES J\5 TICKED SUPPLED QfM CM

Total cheque/RD. enclosed

Cheque payable to Quicksilva Limited

NAME

ADDRESS

Please send order to

QUICKSILVA

Palmers ton Park House,

1 3, Palm erst on Road,
Southampton SOI ILL.

Send S.A.E. for Catalogue. QS

Games are available through Boots,
J. Menaea. Smiths^ HamleyB, Laakys
and all leading computer stores.